Reginald Klot is a 72 y/o male who presents to the ED with sudden onset of headache, nausea, vomiting, and left-sided numbness. He has a history of hypertension and hyperlipidemia. These symptoms occurred approximately two hours ago. CT scan: right carotid artery thrombolic occlusion. Plan: tPA. Dr. Emergin explains the procedure to Mr. Klot's wife in layperson's terms. What is the most likely cause of Mr. Klot's symptoms?
1) Migraine
2) Stroke
3) Sinusitis
4) Hypoglycemia