Kirk's Dik-Dik Is a Small African Antelope That Usually Forms

Kirk's dik-dik is a small African antelope that usually forms male-female pairs. Males place their scent marks over those of the female, which hides the signals of sexual receptivity that females produce when they are fertile. This finding supports the

A) mate limitation hypothesis.
B) mate guarding hypothesis.
C) mate assistance hypothesis.
D) infanticide hypothesis.