Early Hominids Display a Relatively Lower Level of Sexual Dimorphism

Early hominids display a relatively lower level of sexual dimorphism in body size than living gorillas and living orangutans do.What could be inferred from this finding?

A) that early hominids were more competitive
B) that early hominids were more cooperative
C) that early hominids ate meat
D) that early hominids existed in large sedentary groups