Male Primates Most Often Compete for Mates While Female Primates

Male primates most often compete for mates while female primates compete for other resources.What does this demonstrate?

A) Reproduction places different energy demands on males and females,resulting in different reproductive strategies.
B) Reproduction has similar energy demands for both sexes,so males and females respond accordingly.
C) Primates do not vary in their ability to respond to differing energy requirements.
D) Males acquire resources to ensure the survival of their offspring.