Final answer:
Nicotine activates the nicotinic receptors in the peripheral nervous system, which facilitates synaptic transmission at all autonomic ganglionic synapses.
Step-by-step explanation:
Nicotine, a highly addictive plant toxin, activates nicotinic receptors in the peripheral nervous system. These receptors are found in the ganglia of the autonomic system. When nicotine binds to these receptors, it activates the ganglionic neurons, causing depolarization of the ganglia.
This means that the correct answer is c) facilitate synaptic transmission at all autonomic ganglionic synapses.