salt and water sand and sawdust seashells and water sawdust and seashells
I gave my students this multiple choice question: Students stir salt, sand, sawdust, and seashells into a jar filled with water. Which of the materials will form a solution?

Only one answer is correct among these 4 choices:
- salt and water
- sand and sawdust
- seashells and water
- sawdust and seashells

Could you tell me which one is correct?

salt and water