A

Post-partum women are in a marked hypercoagulable state, and cerebral (cortical) venous thrombosis typically presents within the first week after delivery with headache, seizures and signs of raised intracranial pressure such as papilledema, often without focal neurological deficits; this pattern fits the vignette far better than the other options [Vaidyanathan 2005, PMID 22473195; Bajko 2021, PMID 33806706].