How do Narcotic Agonists-Antagonists work?

a. By binding to specific opioid receptors in the central nervous system and producing analgesia
b. By increasing the release of endorphins in the brain, providing pain relief
c. By blocking the effects of opioid drugs, reducing the risk of overdose
d. By producing a combination of effects, acting as both an agonist and antagonist at the same time
e. By modulating the perception of pain and altering the emotional response to pain stimuli