You are presented with the question "What does caffeine do?" and the following answer choices: 
- Increase fame
 - increases a body's strength
 - Release energy
 - Increase user's heart rate
 - Transfers energy
 - decrease stamina
 - Increase intelligence
 - Increase wealth

Now knowing that caffeine is a central nervous system stimulant and cocaine is a stimulant and increases the user's heart rate and blood pressure, choose the best answer.


 

    Increase user's heart rate     