How did Genghis Khan promote unity and exchange of culture in the empire? by eliminating taxes on trade and other business
by outlawing travel by people from outside the empire
by using spies to ensure that his laws were being upheld
by starting a kind of postal service to speed communication

by eliminating taxes on trade and other business by outlawing travel by people from outside the empire * by using spies to ensure that his laws were being upheld o by starting a kind of postal service to speed communication

Explanation:

Can I get brianlest please?

by starting a kind of postal service to speed communication

Explanation:

answer; for children with two myopic parents,the likelihood of becoming myopic is ) correlated with the number of hours spent playing sports each week;

the right answer is a