Fact 1: Arteries generally carry oxygen-rich blood.

Fact 2: Most strokes occur when a blood clot blocks an artery that carries oxygenated blood to the brain.

Given the two facts above, answer the question "What happens when oxygenated blood doesn't reach the brain?" with the following options: 
- anemia
 - Dehydration
 - blood flows to the heart
 - increased iron in the brain
 - arteries unclog
 - It decreases
 - a stroke
 - fever


 

       a stroke  