A 70-year-old man is admitted with acute confusion, fluctuating level of consciousness and visual hallucinations after hip surgery. According to the Delirium Clinical Care Standard, what is the cornerstone of initial management?AImmediate high-dose antipsychotic medication for allBIdentify and treat underlying causes while providing supportive, non-pharmacological careCPhysical restraint to prevent fallsDLong-term benzodiazepine therapyENo investigation; delirium will resolve spontaneouslyCheck my answer