How did the Columbian Exchange affect farming in the Americas? A. New crop varieties took the place of traditional crops..
B. Less land was needed to grow food for the population.
C. Food from other lands caused Americans to stop farming.
D. Foreign animals were mixed with native animals to create new breeds.

a, new crop varieties took the place of traditional crops.

Explanation:

brainliest is someone you pick by simply clicking a button. it only shows up if there are two people that answered your question, then you decide who answer more accurately with detail and explanation and you give that person the title "brainliest".

i hope this your understandings.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.