Why Might Neanderthals Have Been More Affected by Changes in Food

Multiple Choice

Why might Neanderthals have been more affected by changes in food sources than H.sapiens?  

A) Neanderthals were primarily meat eaters.
B) Neanderthals had no ability to store food.
C) Neanderthals had no tools with which to process food.
D) Neanderthals could digest a limited number of proteins.
E) Neanderthals required a greater number of essential amino acids.