Which Statement Best Describes the Role of a Neurotransmitter in the Body

Which statement best describes the role of a neurotransmitter in the body?

A) Neurotransmitters facilitate the transfer of a signal from one neuron to the next, across the synaptic cleft.
B) Neurotransmitters facilitate the passage of an electrical impulse through a neuron.
C) Neurotransmitters facilitate the passage of an electrical impulse through an axon.
D) Neurotransmitters initiate an electrical response to a stimulus.
E) Neurotransmitters block all electrical impulses through neurons.