Why Would a Predominately Meat-Based Diet Be a Severe Restriction

Multiple Choice

Why would a predominately meat-based diet be a severe restriction on the possible size of the human population?

A) The hormones found in beef have a negative effect on human fertility.
B) Such a diet would shorten the average life span of humans.
C) There is not enough biochemical energy available at that trophic level to support a very large population.
D) The land area taken up by livestock would prevent people from finding new places to live.