The Pelvis and Gluteal Muscles in Apes and Humans Are

The pelvis and gluteal muscles in apes and humans are

A) almost identical, even though the two groups of primates locomote in entirely different ways.
B) different in their shape and size so that the difference between quadrupedal and bipedal locomotion can be distinguished.
C) almost identical, since the two types of primates both move around quadrupedally and bipedally, as needed.
D) the same except for the size of the gluteal maximus, which is largest in the nonhuman ape.