From an Evolutionary Perspective, Ape Language Experiments

From an evolutionary perspective, ape language experiments

A) give us no clues into the origins of human language.
B) indicate that human language capabilities must have been present in the last common ancestor of hominids and the African apes.
C) indicate that apes will soon evolve human-like language capabilities.
D) suggest some clues as to the origin of human language.
E) indicate no common ancestral characteristics.