A Possible Advantage of the Absence of Large Domesticated Animals

A possible advantage of the absence of large domesticated animals in the Americas is that

A) early Americans were forced to rapidly create technological innovations in order to make farming more efficient by hand.
B) early Americans were forced to eat a largely vegetarian diet, which improved their nutrition greatly.
C) early Americans were spared from contracting diseases such as small pox and chicken pox.
D) most early Americans were compelled to abandon foraging for more efficient and sustainable farming practices.