You are presented with the question "What happens when muscular walls of arteries and veins contract?" and the following answer choices: 
- connection
 - It expands
 - Dehydration
 - construction
 - forces
 - massive damage
 - constriction
 - contraction

Now knowing that constriction occurs when the muscular walls of blood vessels contract and arteries and veins are blood vessels, choose the best answer.


 

       constriction  