Of all the kinds of life exchanged when the old and new worlds met, which of the following had the greatest impact? domesticated animals new crops religion germs and disease

Option: germs and disease  

Explanation:

After the discovery of America during the 1400s started the Columbian exchange between the old and the New World. Europeans introduced domestic animals and some crops along with diseases that killed the entire civilizations of the Native Indians after they came into contact with the Europeans. Some of the diseases included smallpox, chickenpox, malaria, measles, cholera, scarlet fever, etc.                      

i am sure the answer is d

when in doubt choose c

it's what my teacher told my class when we were going into psats