The article states that the languages of most uncivilized peoples are______.

A．They consist largely of grunts and groans.
B．They are extremely complex, delicate, and ingenious pieces of machinery for the transfer of ideas.
C．They fall behind our Western languages in their vocabularies.
D．They don' t possess the machinery for vocabulary expansion.

A．The study of languages has discredited anthropological studies
B．The study of languages has reinforced anthropologists in their view that there is no hierarchy among cultures
C．The study of languages is the same as the study of anthropology
D．The study of languages casts a new light upon the claims of anthropologists