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A 31-year-old female at 37 weeks gestation suddenly begins seizing at home. Her partner reports worsening headaches, blurred vision, and significant facial and hand swelling over 3 days. She has no prior seizure history. Which pathophysiological mechanism BEST explains this seizure?

HELLP syndrome-associated thrombocytopenia causing spontaneous intracranial hemorrhage Hypoglycemia from placental glucose transfer depleting maternal serum glucose below the seizure threshold Cerebral vasospasm and forced hyperperfusion injury secondary to severe hypertension disrupting the blood-brain barrier Amniotic fluid embolism triggering an anaphylactoid systemic inflammatory response affecting cerebral function