In the Study the Scientists Compared the Levels of ADH

In the study the scientists compared the levels of ADH in the two species of voles.What hypothesis were they testing?

A) That montane voles have higher levels of ADH and are thus monogamous
B) That pug-nosed voles have higher levels of ADH and are thus promiscuous
C) That prairie voles have higher levels of ADH and are thus promiscuous
D) That montane voles have higher levels of ADH and are thus promiscuous
E) That prairie voles have higher levels of ADH and are thus monogamous