Fusion of synaptic vesicles is stopped by

A) Reduction in [Ca²⁺] within the nerve terminus
B) Depletion of the pool of readily releasable neurotransmitter
C) Recycling of synaptic vesicles
D) Ca²⁺ binding to synaptotagm in
E) Ca²⁺ entry through voltage-dependent Ca²⁺ channels