A 36-year-old man with a known opioid use disorder is found unresponsive with pinpoint pupils and respiratory rate of 4 breaths/min. There are no signs of trauma. What is the most appropriate immediate management in the emergency department?AAdminister naloxone and support airway and ventilationBObtain CT head before any interventionCAdminister flumazenilDStart methadone maintenance immediatelyEObserve without intervention as he will likely recover spontaneouslyCheck my answer