THE CORRECT ANSWER IS (E). ANY INFORMATION THAT HELPS DETERMINE TH...
30. The correct answer is (E). Any information that helps determine the actual cause of
the immediate performance boost will help evaluate the researcher’s hypothesis. Of the
five avenues of investigation listed, only choice (E) will yield this type of information. If
it turns out that a new chain reduces gear friction, thereby allowing the cyclist to ride
just as fast but with less effort, then this fact would help disprove the researcher’s
hypothesis—especially if friction increases materially during the first three weeks
of use.