A chemical reaction occurs between methane and oxygen to produce carbon
dioxide and water.

methane + oxygen yields carbon dioxide + water

Which of the following statements is true of this reaction?
A. The mass of products will likely be greater than that of the reactants.
B. The mass of oxygen atoms will be greater in the products than in the reactants.
C. The mass of carbon in the reactants is equal to the mass of carbon in the products.
D. The mass of reactants will likely be greater than that of the reactants.