Meat Consumption in Early Foragers' Diets Was Likely

Meat consumption in early foragers' diets was likely:

A) very high, as cereal crops were unavailable until the onset of agriculture.
B) very high, as meat was essential for cognitive advances in human evolution.
C) less than a third of the diet, which mostly consisted of non-cereal plant items.
D) less than a third of the diet, because the tools for advanced hunting did not appear until much later.
E) negligible (made up about 0% of it) .