Sexual dimorphism evolved among Old World primates for all of the following reasons EXCEPT

A  Old World primates began living terrestrially, leading females to choose larger and more aggressive male mates for protection.

B  ales needed to become larger in order to dominate over females sexually.

C  In order for a male primate to become polygynous, he needs to be able to protect his female mates and all their children single handedly, so females began to mate with larger and more aggressive males.

D  Since New World primates are primarily arboreal, larger bodies found in sexually dimorphic species would be a hindrance to their locomotion.