Which Precaution Is Most Important to Teach a Patient Who

Which precaution is most important to teach a patient who is prescribed enfuvirtide (Fuzeon) ?

A) "After the drug is mixed,store it away from light."
B) "Use sterile technique to draw up and inject the drug."
C) "Do not take this drug if there is any possibility that you are pregnant."
D) "Mix the drug with tap water,then rinse the drug's original container and add that fluid to the drug mixture."