Which statement best explains how improved transportation technologies affected the economies of ancient civilizations

Assuming that this is referring to the same list of options that was posted before with this question, the correct response would be that improved transportation technologies allowed for faster and more efficient transport of goods and services, which led to more productive societies, which led to higher GDP.

OR

Merchants could carry goods long distances, allowing these civilizations to specialize in producing certain items and gain wealth through trade.

mark brainliest pls

the answer is migration

the correct answer is d