A Nurse Is Preparing an Injection by Withdrawing the Solution

A nurse is preparing an injection by withdrawing the solution from a multidose vial. What is necessary to facilitate withdrawing a medication from the vial?

A) first inject an equal amount of air into the vial
B) withdraw the liquid and then inject an equal amount of air
C) insert the needle and slowly withdraw the liquid
D) insert a separate needle to equalize the pressure