Hey there!
The answer to your question would be option C. Water.
This is because water is the healthiest option and does not contain any sugar or caffeine. Coffee has a lot of caffeine which means it will keep you up late to the point you will be sleepy most of the day, Gatorade has a very high amount of sugar which is not healthy, and tea can be sometimes healthy, but some of it can have a great amount of sugar as well.
Hope this helps you.
Have a great day!