A 62-year-old with new right hemiparesis arrives 9 hours after last-known-well. CTA shows proximal left M1 occlusion; CT perfusion demonstrates a small core with a large penumbra. What is the most appropriate reperfusion strategy now?AIV alteplase because arrival is within 12 hoursBEndovascular mechanical thrombectomyCAspirin now and observationDHeparin infusion for cerebral reperfusionENo reperfusion therapy because the 6-hour window has passedCheck my answer