Which Precaution Is Most Important for the Nurse to Teach

Which precaution is most important for the nurse to teach older adults who are prescribed maraviroc (Selzentry) ?

A) "If an injection site infection occurs, do not reuse that site until the skin has healed completely."
B) "Take the drug with food or milk to reduce the likelihood of GI side effects."
C) "Change positions slowly when moving from a sitting to a standing position."
D) "Store the drug at room temperature."