When Animals Are Subjected to Stress, Prolonged Activation of the Sympathetic

When animals are subjected to stress, prolonged activation of the sympathetic nervous system results in a(n)

A) increase in production of enzymes that degrade neurotransmitters, such as MAO.
B) reduction in the numbers of enzymes that degrade neurotransmitters, such as ADH.
C) increase in production of enzymes used for neurotransmitter synthesis, such as TH.
D) increase in the numbers of enzymes used for neurotransmitter synthesis, such as ATPase.
E) increase in the availability of precursors such as tryptophan.