A 32-year-old man with severe opioid use disorder using illicit fentanyl daily presents requesting help. According to the updated Canadian guideline for opioid use disorder, what is the preferred first-line treatment?AShort inpatient withdrawal management (detox) without ongoing medicationBLong-term abstinence-based residential treatment onlyCOpioid agonist therapy with buprenorphine-naloxone or methadoneDNaltrexone depot injection as first-lineEClonidine and non-opioid analgesics onlyCheck my answer