A nurse is preparing to administer vancomycin IV to an adult client. The client asks the nurse if the medication can be given 2 hr earlier. Which of the following statements should the nurse make?

A. Infusing vancomycin at a faster rate could increase the risk of infusion-related reactions such as "red man syndrome" and is not recommended. B. While a slight adjustment may be possible, 30 minutes is a short timeframe, and altering the time significantly could affect the therapeutic efficacy or safety of the drug. C. The nurse typically has a 2-hour window to administer medications like vancomycin, but this should be done according to facility policy and the specific medication schedule. D. Adjusting the time and schedule to the client's convenience may not ensure that the medication is administered effectively and within the proper timeframe.