Final answer:
The correct method for withdrawing medications from a vial is to pop the rubber stopper using a scissor or surgical instrument, then use a sterile needle and syringe to withdraw the medication and dispense it on a sterile field using aseptic technique.
Step-by-step explanation:
When withdrawing medications from a vial, it is important to use aseptic technique to prevent contamination. The correct method is option D, which is to use a scissor or surgical instrument to pop the rubber stopper and then use a sterile needle and syringe to withdraw the medication from the vial. The medication is then dispensed on a sterile field using aseptic technique. This ensures that the medication remains sterile and safe to use.