With Regard to Neurotransmitters Involved in Fear / Anxiety

Multiple Choice

With regard to neurotransmitters involved in fear / anxiety

A) serotonergic circuits are primarily involved.
B) dopamine agonists increase the fear / anxiety response in animals.
C) the roles of GABA, norepinephrine and serotonin are the most studied.
D) Only GABA has been well studied but others are thought to be involved.
E) GABA's function in the brain is processing threat-related stimuli.