A Nurse Is Preparing to Administer a Medication by IV

A nurse is preparing to administer a medication by IV bolus through an existing IV line.What is the correct order for administering the medication? (Separate letters by a comma and space as follows: A,B,C,D.)

A) Perform hand hygiene and apply gloves.
B) Aspirate for blood return before injecting the medication.
C) Occlude the IV line by pinching the tubing just above the injection port.
D) Verify the specified time recommendation for administration of this medication.