Which Action of the Nurse Demonstrates the Use of Standard

Which action of the nurse demonstrates the use of standard precautions?

A) The nurse uses gloves when performing oral care for the patient.
B) The nurse puts on a surgical mask before entering the patient's room.
C) The patient is placed in a private room with negative-pressure airflow.
D) The nurse uses sterile gloves when emptying the patient's urinary catheter bag.