Posted: August 12th, 2016

t is generally thought that four critical innovations arose during the evolution of our ape-like ancestors into humans. All of the following are innovations excep

It is generally thought that four critical innovations arose during the evolution of our ape-like ancestors into humans. All of the following are innovations except

A. bipedalism.

B. use of brain power for abstract thought.

C. expansion of the human brain.

D. toolmaking.

E. development of the opposable thumb.