An 80-year-old man becomes acutely confused and agitated 2 days after hip replacement surgery. He is disorientated in time and place and is pulling out cannulas. There is no focal neurology. What is the most important initial management step?AStart antipsychotic medication immediatelyBLook for and treat underlying causes such as infection, hypoxia, pain or urinary retentionCRestrain the patient physically without further assessmentDSedate with high-dose BenzodiazepinesEDischarge the patient home to familiar surroundingsCheck my answer