Which of the following was NOT an effect of the exchange of diseases on Latin America?

a. syphilis was introduced to Europe

b. thousands of deaths due to small pox

c. the production of new types of agriculture

d. the African slave trade brought new laborers

(its not a because i tried it)

The answer is B.

The primary positive effect of the Columbian exchange was the introduction of New World crops, such as potatoes and corn, to the Old World. The most significant negative effects were the transmission of African populations into slavery and the exchange of diseases between the Old and New World.