Which of the following was not an advantage of shipping luxury products like tea, coffee, and opium by sea?
select the best answer from the choices provided.
a.
they could be stored compactly.
b.
they were often in high demand.
c.
they could all be transplanted and grown in europe.
d.
they were all expensive so their trade was profitable.

c. mass = force / accellaration

step-by-step explanation:

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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the answer is