It seems probable that the group of chemical compounds known as the biogenic amines may play an important role in causing mental depression.
(A) may play
(B) play
(C) plays
(D) might play
(E) has been playing
I am confused between option B and C
(A) may play
(B) play
(C) plays
(D) might play
(E) has been playing
I am confused between option B and C












