use equal masses of baking soda and vinegar determine the masses of all the substances before and after the reaction determine the mass of the carbon dioxide and water that is produced compare the mass of the vinegar and water to be certain they are
I gave my students this multiple choice question: Baking soda mixed with vinegar produces carbon dioxide and water. The best way to prove that no mass was lost during this reaction is to

Only one answer is correct among these 4 choices:
- use equal masses of baking soda and vinegar
- determine the masses of all the substances before and after the reaction
- determine the mass of the carbon dioxide and water that is produced
- compare the mass of the vinegar and water to be certain they are

Could you tell me which one is correct?

determine the masses of all the substances before and after the reaction