A 37-year-old woman who gave birth to twins 24 hours ago suddenly develops blurred vision, severe headaches, and upper abdominal pain under the ribs on her right side. Her last blood pressure reading was 146/92 mmHg. Which of the following is the most appropriate treatment?

Choice A reason: Low-dose aspirin is typically used for preeclampsia prevention during pregnancy, not for acute postpartum management of hypertensive emergencies. Choice B reason: This is the correct answer. The patient’s postpartum onset of hypertension, headaches, blurred vision, and right upper quadrant pain is consistent with postpartum preeclampsia or eclampsia risk. Magnesium sulfate is the treatment of choice to prevent seizures in this context. Choice C reason: Lorazepam is an anxiolytic and sedative; it does not prevent seizures in preeclampsia and is not indicated for acute management. Choice D reason: Lactated Ringer's solution may be used for hydration but does not address the pathophysiology of postpartum preeclampsia or prevent complications.