A nurse is caring for a client who is receiving penicillin G via intermittent IV piggyback. Which of the following actions should the nurse take?

A. Diarrhea can be a sign of Clostridioides difficile (C. diff) infection, which is a possible complication of antibiotic therapy. The client should report persistent diarrhea to the provider. B. Penicillin G should not be refrigerated after reconstitution; it is typically used immediately or stored at room temperature for a limited time. C. Checking for a sulfa allergy is not necessary because penicillin and sulfa drugs are different classes of antibiotics. D. Penicillin G should be infused over 30 to 60 minutes, not 10 minutes, to reduce the risk of adverse effects.