PLEASE HELP Use the passage below to answer all parts of the question that follows.
"One of the main historical impacts of improvements in transport infrastructure has been to make possible and to reduce the costs of long-distance trade and so make markets more integrated. . . . Transport activity and economic growth appear in the aggregate to be correlated, and assertions that improved mobility causes growth in the economy are common. This causality is important but difficult to prove. From a theoretical perspective, four relationships are possible: (i) changes in transport activity 'cause‘ changes in economic growth, meaning that travel is an essential component of and helps produce economic growth . . .; (ii) changes in economic growth 'cause‘ changes in transport activity, meaning that growth in the demand for travel depends on economic growth; (iii) the causality is bi-directional, meaning that each has an effect on the other; or (iv) there is no relationship, meaning that the fact that they have tended to grow in tandem does not imply that one causes the other (Ecola & Wachs, 2012).”

–Contribution of Transport to Economic Development: International Literature Review with New Zealand Perspectives,
New Zealand Ministry of Transport,
2014

A) Describe ONE piece of historical evidence dealing with transportation and commercial technology that developed from 1200 to 1450 CE that would support the first relationship described in the passage.

B) Explain ONE piece of historical evidence dealing with credit and money economies that developed from 1200 to 1450 CE that would support the second relationship described in the passage.

C) Explain ONE piece of historical evidence dealing with state interactions in the economy that developed from 1200 to 1450 CE that would support the fourth relationship described in the passage.

A) One piece of historical evidence dealing with transportation and commercial technology that developed from 1200 to 1450 CE that would support the first relationship would be " Transport activity and economic growth appear in the aggregate to be correlated, and assertions that improved mobility causes growth in the economy are common. "

B ) One piece of historical evidence that would support the second relationship in this passage would be "transport infrastructure has been to make possible and to reduce the costs of long-distance trade and so make markets more integrated." What the author is trying to say is that transport infrastructure has reduced the cost of long distance trading which caused markets to integrate which makes it more high in demand , the more its being traded and the cost is cheap the more markets would want it.  

C) One piece of historical evidence with state interactions in the economy is that " Transport activity and economic growth appear in the aggregate to be correlated, and assertions that improved mobility causes growth in the economy are common. This causality is important but difficult to prove." The expansion and intensification of long-distance trade routes often depended on environmental knowledge

Explanation:

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A) One piece of historical evidence dealing with transportation and commercial technology that developed from 1200 to 1450 CE that would support the first relationship would be " Transport activity and economic growth appear in the aggregate to be correlated, and assertions that improved mobility causes growth in the economy are common. "

B ) One piece of historical evidence that would support the second relationship in this passage would be "transport infrastructure has been to make possible and to reduce the costs of long-distance trade and so make markets more integrated." What the author is trying to say is that transport infrastructure has reduced the cost of long distance trading which caused markets to integrate which makes it more high in demand , the more its being traded and the cost is cheap the more markets would want it.  

C) One piece of historical evidence with state interactions in the economy is that " Transport activity and economic growth appear in the aggregate to be correlated, and assertions that improved mobility causes growth in the economy are common. This causality is important but difficult to prove." The expansion and intensification of long-distance trade routes often depended on environmental knowledge

Explanation:

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