Respuesta :
Answer: The answer is C- Gamma amino butyric acid and glycine are excitatory neurotransmitters.
Explanation:
This is because Gamma amino butyric acid (GABA) and glycine are known to be inhibitory neurotransmitters in the central nervous system. They are both amino acids, they act as inhibitory neurotransmitters by blocking nerve impulses. Inhibitory neurotransmitters are known to decrease neuron's action potential.