au-amc MCQ (SBA): Falls risk in older adults

A 76-year-old woman in residential aged care has recurrent falls. She has osteoarthritis, hypertension and mild cognitive impairment. Current medications include a benzodiazepine at night, an SSRI, and an ACE inhibitor. According to RACGP Silver Book and falls prevention guidance, which of the following is the most important modifiable risk factor to address first?