Bipedalism Is Considered One of the Hallmarks of Hominid Evolution

Multiple Choice

Bipedalism is considered one of the hallmarks of hominid evolution because

A) it was the first evolutionary development that clearly distinguished us from other animals.
B) it was possible only after the advent of simple material culture.
C) it followed brain expansion in human evolution.
D) it allowed hominids to come out of the trees and make tools 10 mya.