A 35-year-old man with severe opioid use disorder is considering treatment. He has no significant comorbidities and is not pregnant. According to recent Canadian OUD guidelines, what is the preferred first-line pharmacologic treatment?AMethadone maintenance for all patientsBBuprenorphine-naloxone as first-line opioid agonist therapy when feasibleCNaltrexone depot injection for all patientsDAbrupt abstinence without pharmacotherapyEShort-term codeine taperCheck my answer