A nurse is providing education to a client about magnesium oxide. Which of the following statements by the client indicates a correct understanding of magnesium oxide?

Rationale: A. Taking magnesium oxide on an empty stomach can cause gastrointestinal irritation; it’s best taken with food or water. B. Coffee can interfere with absorption of some medications and may worsen GI upset; it's not recommended. C. Drinking a full glass of water helps ensure proper dissolution and absorption of the medication and minimizes GI side effects. D. Crushing magnesium oxide tablets is not recommended unless specifically directed, as some formulations are meant to be swallowed whole.