Which of the Following Is a Preoperative Patient Preparation Procedure

Which of the following is a preoperative patient preparation procedure that may help to reduce the risk of infection as a result of surgery?

A) Keeping the preoperative visit as short as possible.
B) Wearing a mask, sterile gloves, gown and shoe covers when interacting with the patient.
C) Performing regular dressing changes to keep the incision clean and dry.
D) Taking careful measures to avoid contaminating the sterile field.