John Wingfield and His Coauthors Made the Following Statement Early

Multiple Choice

John Wingfield and his coauthors made the following statement early in their article on testosterone and the challenge hypothesis: "The prevailing 'challenge' hypothesis asserts that testosterone and aggression correlate only during periods of heightened interactions between males." This statement is a

A) definition of the challenge hypothesis.
B) prediction derived from the challenge hypothesis.
C) statement about the evidence that supports the challenge hypothesis.
D) scientific conclusion.