A nurse is transcribing a client's prescription for erythromycin 500 mg four times per day. Which of the following information should the nurse clarify with the provider?

A.The prescription specifies “four times per day,” which is clear. B. The medication specified is erythromycin, which is clear C. The dosage of 500 mg is clearly specified. D. The route of administration eg. oral, topical is not specified and needs to be clarified to ensure proper administration.