The breath mint was less soluble than the toothpaste. The breath mint was more soluble than the toothpaste. The breath mint had a lower density than the toothpaste. The breath mint had a greater density than the toothpaste.
I gave my students this multiple choice question: James placed a breath mint and a lump of toothpaste in a cup of water and let it sit overnight. Which statement best explains why the breath mint was gone the following morning, but the toothpaste was still at the bottom of the cup?

Only one answer is correct among these 4 choices:
- The breath mint was less soluble than the toothpaste.
- The breath mint was more soluble than the toothpaste.
- The breath mint had a lower density than the toothpaste.
- The breath mint had a greater density than the toothpaste.

Could you tell me which one is correct?

The breath mint was more soluble than the toothpaste.