A nurse is caring for a client who has preeclampsia and is experiencing a postpartum hemorrhage. The nurse should expect the provider to prescribe which of the following medications?

A. Carboprost: Carboprost is a prostaglandin used to treat postpartum hemorrhage, but it is contraindicated in clients with asthma or certain cardiovascular conditions. While effective, it may not be the first-line choice for a client with preeclampsia. B. Methylergonovine: Methylergonovine is an ergot alkaloid used to treat postpartum hemorrhage, but it is contraindicated in clients with hypertension or preeclampsia because it can cause severe vasoconstriction and elevate blood pressure. C. Oxytocin: Oxytocin is the first-line uterotonic for managing postpartum hemorrhage. It promotes uterine contractions, helping to reduce bleeding, and is safe to use in clients with preeclampsia, making it the most appropriate initial medication. D. Nifedipine: Nifedipine is a calcium channel blocker used to manage hypertension or preterm labor, not for treating postpartum hemorrhage. It does not promote uterine contraction or control bleeding.