You are presented with the question "What occurs when the muscular walls of blood vessels contract?" and the following answer choices: 
- Dehydration
 - rapid expansion
 - smooth skin
 - smoking tobacco
 - loose bumping
 - pinched nerves
 - tight sqeezing
 - movement

Now knowing that constriction occurs when the muscular walls of blood vessels contract and cocaine also tightly squeezes, or constricts, the coronary arteries that feed blood to the heart, choose the best answer.


 

       tight sqeezing  