I have problem choosing between choice (C) and (D). I acknowledge that in (C), Susan did not do something that was inconsistent with what she was recommending, rather, she was forced to be in a situation that was contradictory to her opinion. However, in (D), Pat has shown the research saying that e...

(C) says only the subjects without insomnia were significantly affected by doses of melatonin. And the conclusion of the Stimulus is "But this does not mean that melatonin is helpful in treating insomnia." Nowhere in the stimulus appears an indication that "in order to say A is helpfu...