The table shows mass and volume measurements in an investigation that involves vinegar and baking soda, both before and after the chemical reaction. What evidence supports the law of conservation of mass?

A. The mass remains constant before and after the chemical reaction
B. The volume of the products is more than the volume of the reactants, so it does not support the law of conservation of mass.
C. The mass of the gas is more than the mass of the baking soda, so the mass is constant
D. The density of the products is less than the reactants, so the mass is constant.