【单选题】

The primary purpose of the passage is to
A．(A) contend that key terms in a scientific theory have been improperly used

B．(B) argue that proponents of a scientific theory have obscured important details
C．(C) demonstrate that two views once thought to be in conflict are actually identical
D．(D) suggest that proponents of a theory have not stated their data in an exhaustive manner
E．(E) show that a theory has been drawn into question by a more recent study