Caffeine is a central nervous system stimulant, and likewise, the caffeine and saccharose stimulate the body's stimulation of serotonin. Given these facts, what is a central nervous system stimulant among the following options:
- saccharose
 - barbiturates
 - cigarettes
 - sweating
 - muscle relaxants
 - A Greek letter
 - Decibels
 - valium


 

 saccharose        