What Is the Correct Sequence of Information Flow in a Spinal

What is the correct sequence of information flow in a spinal reflex arc? (There can be missing steps, but the sequence must be correct.)

A) sensory stimulus -> receptor potential in sensory receptor -> action potential(s) in sensory neuron -> neurotransmitter release by sensory neuron
B) neurotransmitter release by sensory neuron -> action potential(s) in motor neuron -> neurotransmitter release by motor neuron -> action potential in motor neuron -> response in effector
C) graded potential in motor neuron -> action potential(s) in motor neuron -> neurotransmitter release by motor neuron -> response in effector
D) All of the choices are correct.