Bob Is a Competitive Body Builder

Bob is a competitive body builder. His trainer suggested that he consume 4 egg white omelets per day, but he remembers a warning about a possible vitamin deficiency from consuming too many egg whites. What advice would you provide to Bob?

A) He should not be concerned as long as he consumes both the yolk and whites of the eggs.
B) He should not follow the diet, since the avidin in the egg whites could bind to niacin and prevent its absorption.
C) He should not follow the diet, since the avidin in the egg whites could bind to biotin and prevent its absorption.
D) He should not be concerned, because, when the eggs are cooked, the avidin protein is denatured, and thus does not pose a problem for deficiency disease.