You are presented with the question "what happens when muscular walls of blood vessels contract?" and the following answer choices: 
- matter vibrating
 - Dehydration
 - Leptospirosis
 - rapid expansion
 - at or near the margins
 - recovery time from fatigue
 - blood pressure rises
 - major threat to health

Now knowing that constriction occurs when the muscular walls of blood vessels contract and constriction raises blood pressure, choose the best answer.


 

       blood pressure rises  