B.
Water is a solid because it freezes, sooner or later. It turns to ice, and ice is a solid.
It’s a gas because if you boil water, the water changes from a liquid to a water vapor. As it cools, it turns to steam.
The liquid water is what we drink. It is a fluid and wet, which is liquid.
Basically it's a key to candidates because it is considered to influence the overall result of the president election. Democratic and Republicans both have a good chance to gain a win.