The Mesoamericans Supplemented Their Diets with Foods Rich in Amino

The Mesoamericans supplemented their diets with foods rich in amino acids and vitamin B12 - like squash and beans - because they

A) Were forbidden to kill animals and eat their meat.
B) Ate little meat.
C) Had never developed hunting skills.
D) Did not have the tools necessary to eat meat.
E) Did not have the skills and knowledge of how to skin and prepare animals for consumption.