Read the excerpt from an article published by the Centers for Disease Control and Prevention.

Drinking water can prevent dehydration, a condition that can cause unclear thinking, result in mood change, cause your body to overheat . . . and kidney stones.

Which personal connection is most relevant to the topic?

I read in a medical book that kidney stones can be very painful for a person.
I have tried to drink more water, but I just prefer something with some flavor.
Yesterday when I was at the train station, I saw them installing stations for refilling water bottles.
The other day, I did not drink much water, and I struggled to focus on my math homework.