Juan wants to jump in and clarify when he occasionally hears statements about Stone Age humans, such as they “discovered fire” or “found tools.” He thinks comments like these are oversimplified. What is the MOST likely reason Juan feels the comments are oversimplified?

A.
Fire is a natural element, but tools definitely are not.

B.
Culture then was so basic that these discoveries were revolutionary.

C.
Any true discovery marks an important milestone in human history.

D.
They did not discover or find, they applied natural elements to their use.