In Neurotransmission at the Synapse,after a Neurotransmitter Is Released It

In neurotransmission at the synapse,after a neurotransmitter is released it diffuses across the synaptic cleft and:

A) attaches to receptor sites on the receiving cell.
B) continues traveling down the axon of the next neuron as an action potential.
C) never actually touches the receiving neuron but acts as a stepping stone for the action potential to skip across the gap and keep traveling down the next neuron.
D) uses ion channels to enter the next neuron.