What Is the Difference Between Neurotransmitters and Neuropeptides

What is the difference between neurotransmitters and neuropeptides?

A) Neuropeptides are generated by neuronal cells but do not transmit signals.
B) Neurotransmitters are small hydrophilic molecules, and neuropeptides are small proteins.
C) Neurotransmitters are small protein molecules, and neuropeptides are large ones.
D) Some neuropeptides can act on distant cells, whereas neurotransmitters cannot.