Fact 1: Caffeine is a central nervous system stimulant.

Fact 2: Men seek the excitement of stimulants, because, for the time, the results are agreeable.

Given the two facts above, answer the question "What excites the central nervous system?" with the following options: 
- motion
 - competition
 - eating
 - learning
 - heat
 - caffeine
 - sweating
 - turkey


 

      caffeine   