A patient presents to the emergency room with complaints of having an "exploding headache" for the last 2 hours. The patient is immediately seen by a triage nurse who suspects the patient is experiencing a stroke. Which of the following is a possible cause based on the characteristic symptom?
a) Cerebral aneurysm
b) Cardiogenic emboli
c) Large artery thrombosis
d) Small artery thrombosis
Answer: Cerebral aneurysm