Select the correct answer. Which of the following statements is TRUE?

A. A vegan is a person who chooses not to eat meat, but will eat milk or other animal products.

B. A vegetarian is a person who chooses not to eat any animal products.

C. Vegans and vegetarians need to eat a variety of protein-rich foods.

D. There is no way for vegans and vegetarians to get all the protein they need.