Which of the Following Is Consistent with an Inhibitory Role

Multiple Choice

Which of the following is consistent with an inhibitory role of serotonin in aggression?

A) Lesions of serotonin neurons inhibit aggressive attacks.
B) Levels of 5-HIAA are lower in impulsive violent criminals,compared to those to plan their crimes.
C) Drinking an amino acid mixture that reduces tryptophan decreases aggression in people playing a competitive computer game.
D) All of the above are correct.