You are presented with the question "what can most people only survive a few days without?" and the following answer choices: 
- NaCl
 - television
 - H20
 - food
 - rain
 - urea
 - running
 - h2o

Now knowing that most people can survive only a few days without water and water is made up of H2O molecules, choose the best answer.


 

        h2o 