One function of the third paragraph of the passage is to______
A.state a conclusion about facts presented in an earlier paragraph
B.introduce information that is contradicted by information in the fourth paragraph
C.qualify the extent to which two previously mentioned groups might be similar
D.show the chain of reasoning that led to the conclusions of a specific study
E.demonstrate that, of three explanatory factors offered, two may be of equal significance

A.state
B.introduce
C.qualify
D.show
E.demonstrate