Which Action by the Nurse Is Accurate When Withdrawing Medication

Which action by the nurse is accurate when withdrawing medication into a syringe from a vial?

A) Inject an amount of air equal to the medication into the vial.
B) Break the thin neck of the vial container.
C) Remove the rubber stopper on the top of the vial.
D) Discard the initial 0.5 mL of medication to ensure sterility.