【单选题】

The primary purpose of the passage is to

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