A 22-year-old university student presents to the emergency department with active suicidal ideation and a specific plan but no prior attempts. According to Canadian suicide risk management principles, what is the most appropriate immediate action?ADischarge with reassurance and ask him to call if worseBArrange urgent psychiatric assessment and ensure safety, likely including brief admission or intensive community supportCStart an SSRI and book outpatient follow-up in 1 monthDTell him to avoid talking about suicidal thoughts as it reinforces themERely on friends to supervise him at home without professional follow-upCheck my answer