Fact 1: Caffeine is a central nervous system stimulant.

Fact 2: Over stimulation can cause sleep problems.

Given the two facts above, answer the question "What can too much caffeine in your body cause?" with the following options: 
- energy usage
 - Sleep problems
 - Dehydration
 - heart problems
 - sweating
 - cancer
 - slow your body
 - negative


 

  Sleep problems       