10 facts about the columbian exchange?

#1   Before the Columbian Exchange the Old World hadn’t seen a tomato
#2 Old World animals expanded the food supply in the New World
#3 Horses changed the lifestyle of many Native American tribes
#4 Many Native American tribes were wiped out due to the Columbian Exchange
#5 Smallpox Epidemics in the New World were more deadly than Black Death
#6 Columbian Exchange led to a huge increase in population in the Old World
#7 New World crops have become hugely popular in the Old World
#8 Ireland became so reliant on potatoes that it led to the Great Potato Famine
#9 Columbian Exchange led to the horrors of the Atlantic Slave Trade
#10 Columbian Exchange has led to the extinction of many species

Letter c is the answer.

Answer might be b. i think