Imagine That a Hypothetical Neurotransmitter, Neurotran-X (NTX), Is Synthesized from Two

Imagine that a hypothetical neurotransmitter, neurotran-X (NTX) , is synthesized from two ingredients, neuro-A and tran-B. An enzyme, neurotranoxylase (NTO) , is responsible for producing neurotran-X from the two ingredients. If the rate of synthesis of NTX is controlled through feedback inhibition, you would expect to observe experimentally

A) increasing levels of NTO will lead to increased levels of NTX.
B) reducing levels of neuro-A will reduce levels of NTX.
C) increasing levels of NTX will lead to reduced activity of NTO.
D) reducing levels of neuro-A will lead to reduced activity of NTO.
E) reducing levels of NTX will lead to reduced activity of NTO.