What Are Two Purposes Served by the Recovery of Neurotransmitters

What are two purposes served by the recovery of neurotransmitters?

A) 1) store neurotransmitter into synaptic vesicles; 2) promote neurotransmitter diffusion into glial cells
B) 1) trigger reversed uptake; 2) restore ionic gradients across the membrane
C) 1) dissipate ionic gradients across the membrane; 2) promote neurotransmitter degradation
D) 1) inhibit further neurotransmitter release; 2) promote excitotoxicity
E) 1) prevent neurotransmitter diffusion out of the synaptic cleft; 2) recover neurotransmitter molecules for release