Professor Huntley Is Giving a Lecture on Treatments for Bipolar

 Professor Huntley is giving a lecture on treatments for bipolar disorder. He mentions that some research was looking into using omega-3 fatty acids as a potential supplemental treatment and that results showed

A) the effect was too strong.
B) that patients clearly had significant improvement.
C) that only men benefited from the supplements.
D) that more research is needed as results were mixed.