A nurse cares for a middle-aged female patient diagnosed with diabetes mellitus who is being treated for the third episode of acute pyelonephritis in the past year. The patient asks, "What can I do to help prevent these infections?" How would the nurse respond?

"Use tampons rather than sanitary napkins during your menstrual period."

"Drink more water and empty your bladder more frequently during the day."

"Keep your hemoglobin A1C under 9% by keeping your blood sugar controlled."

"Test your urine daily for the presence of ketone bodies and proteins."