Answer:
A). There is an increase of neurotransmitter molecules in the synapse.
Step-by-step explanation:
Reuptake process is demonstrated as the resorption of the neurotransmitters by the nerve cell that actually secreted it. The primary function of this process is to reprocessing of neurotransmitters and control the level of their presence in synapse.
As per the question, when 'reuptake' process is flagging, 'there is an increase of neurotransmitter molecules in the synapse' as the re-absorption of these neurotransmitters is slowed down by that leads to a significant increase in these cells. Thus, option A is the correct answer.