Answer:
not d, a seems too out of reach, I'd say c or b
Answer:
the answer would be D. synaptic peptide. The synapse, the firing of an action potential in one neuron—the presynaptic, or sending, neuron—causes the transmission of a signal.
Explanation:
Romans would always attribute the stability and success of their empire due to the virtue and strength of their men as well as the will of the gods.