Fact 1: Caffeine is a central nervous system stimulant.

Fact 2: Stimulants can cause overheating and dehydration.

Given the two facts above, answer the question "Caffeine can cause " with the following options: 
- congestion
 - anemia
 - constipation
 - sweating
 - hives
 - energy usage
 - dehydration
 - heat energy


 

       dehydration  