Carbon atoms are unique in their ability to form chains of varying sizes. Which statement correctly describes a reason for the very large variety of these chains

Neurotransmitters are messengers responsible for communication between neurons. they are released from synaptic vesicles and are received by receptors.  the communication is referred to as neurotransmission. the following statement is true about neurotransmitters: a. they're stored in synaptic vesicles in the axon.

Ithink the answer is d.