Ayoung man is brought into the ER, when you start your shift early in the morning. He is unconscious and he has pupillary constriction and depressed respiration. You note needle marks on his legs when you made your nursing assessment. You administer naloxone (Narcan) and he awakens. This agent was effective because: Select one: a. Narcan binds to the opioid and initiates it b. Narcan is a stimulant of the CNS c. Narcan destroy the opioid agent d. Narcan antagonizes opiates at the receptors site.