Review Question - QID 214616

A 30-year-old man is brought to the emergency department following a skateboarding accident. He was jumping down a flight of stairs, lost control, and fell onto concrete without wearing a helmet. During impact, his friends say he hit his head and lost consciousness briefly before recovering. He continued to skateboard for 20 minutes but then began experiencing a severe headache and has vomited 3 times. His temperature is 98.0°F (36.7°C), blood pressure is 165/87 mmHg, pulse is 82/min, and respirations are 19/min. On exam, he is alert and oriented to person and place but not time. His pupils are 4 mm bilaterally and reactive to light. He has no focal neurological deficits. A noncontrast head CT is performed and shown in Figure A. A branch from which of the following vessels is the most likely source of hemorrhage?