Here's a problem to solve: What will happen after stirring sand in a glass of water?

Among the 4 following options, which is the correct answer?

- A: The sand will dissolve in the water because sand in water is a solution.
 
- B: The sand will dissolve in the water because sand in water is a mixture.
 
- C: The sand will settle to the bottom because sand in water is a solution.
 
- D: The sand will settle to the bottom because sand in water is a mixture.
 