Which of the following was a negative consequence of trade routes across Asia, Europe, and Africa? Many wars were fought to gain control of trade routes.
Diseases were often spread along trade routes.
Isolated cultures learned about new goods and ideas.
Increased supply of available goods raised the cost of many items.

Diseases were often spread along trade routes.

Explanation:

Trade routes such as silk route across Asia, Europe, and Africa was use to exchange many things such as food, ideas, clothes, animals and diseases.

A negative consequence of trade routes is that during trade and movement of people from one place to other, spread diseases such as bubonic plague, measles, and small pox. these diseases have no cure at that time and affected the population across badly.

Hence, the correct answer is "Diseases were often spread along trade routes."

B

Explanation:

it was on the rise and doing very well and would continue to do well until the great depression from 1929-1939

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