A 29-year-old man is found unconscious with pinpoint pupils and respiratory rate 6/min after suspected heroin use in a downtown alley. According to opioid overdose management principles, what is the most appropriate immediate intervention?AAdminister naloxone and support airway and ventilationBGive flumazenil intravenouslyCInduce vomiting with ipecac syrupDObserve without intervention until he awakensEStart high-dose intravenous acetaminophenCheck my answer