A nurse is reinforcing teaching with a female client about preventing urinary tract infections (UTIs). Which of the following instructions should the nurse include?

A. Wait to void until the bladder feels full: Delaying urination can allow bacteria to multiply in the urinary tract, increasing the risk of UTIs. Frequent voiding helps flush bacteria from the urethra and bladder, making this unsafe for UTI prevention. B. Drink 16 oz of cranberry juice each day: Cranberry juice contains compounds that may prevent bacteria, particularly E. coli, from adhering to the urinary tract lining. Regular consumption can reduce the risk of UTIs and is a safe preventive measure. C. Use an over-the-counter douche product after intercourse: Douching can disrupt the natural vaginal flora, irritate the mucosa, and increase susceptibility to infections, including UTIs. It is not recommended as a preventive measure for urinary tract health. D. Wear underwear made from nylon: Nylon underwear does not allow adequate ventilation, which can create a moist environment favorable for bacterial growth. Cotton underwear is recommended because it promotes airflow and reduces the risk of urinary and vaginal infections.