Answer:
A There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products.
Step-by-step explanation:
Matter is conserved in a chemical equation if there are no loss of atoms. That means, total number of atoms of elements must be the same as the total number of element on the product side. The correct option is;
A. There are the same number of atoms of oxygen and hydrogen in the reactants as there are in the products.