Here's a problem to solve: People often use a mixture of salt and water to clean contact lenses. Which statement best describes this mixture?

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

- A: Salt is the solvent and water is the solute.
 
- B: Salt is the solute and water is the solvent.
 
- C: Salt is the solvent and water is the solution.
 
- D: Salt is the solution and water is the solvent.
 