A 76-year-old bedbound woman with advanced dementia is admitted to hospital. She is incontinent and spends long periods in bed. On examination her sacral skin is intact. What is the most appropriate strategy to reduce her risk of pressure ulcers?AReposition at least every 2 hours and use a pressure-relieving mattressBKeep her in a semi-recumbent position at all timesCAvoid repositioning to minimise discomfortDUse rubber rings under the sacrumEApply topical antibiotics prophylacticallyCheck my answer