By the Time Homo Habilis Appeared Just Over 2 Million

By the time Homo habilis appeared just over 2 million years ago

A) hominid brain size was roughly the same as that of chimpanzees.
B) hominid brain size had been steadily increasing since the time of the earliest hominids.
C) hominid brain size was roughly 50% that of modern humans.
D) hominid brain size averaged 1000 cc.
E) the brain size of Homo habilis was virtually unchanged from that of earlier hominids.