25. S-adenosylmethionine is a biological carrier of (I) .
ATP is a biological carrier of (II) .
FADH2 is a biological carrier of (III) . (A) I: amino group, II: phosphate, III: nicotinamide (B) I: adenosine, II: carboxylate, III: hydrogen atom (C) I: methyl group, II: adenosine, III: electron (D) I: amino group, II: carboxylate, III: hydrogen atom (E) I: methyl group, II: phosphate, III: electron