A 44-year-old man with severe opioid use disorder using fentanyl daily presents asking for help. According to the updated Canadian guideline on opioid use disorder management, what is the preferred first-line treatment?ADetoxification with short-term abstinence-based withdrawal management onlyBLong-term residential rehabilitation without medicationsCOpioid agonist therapy with buprenorphine or methadone, combined with psychosocial supportsDNaltrexone alone as first-line for all patientsEImmediate incarceration to stop drug useCheck my answer