Why Does This Chapter on Culture Include a Section That

Why does this chapter on culture include a section that describes similarities and differences between humans and apes,our closest relatives?

A) to emphasize culture's evolutionary basis
B) to better define culture as a capacity that distinguishes members of the zoological family hominidae from anatomically modern humans
C) to stress that there is no such thing as human nature
D) to promote the study of primatology, which has nothing to do with human culture
E) to illustrate how evolution is just a theory