Choose ALL the statements which are CORRECT about writing and balancing chemical equations.

A. The arrow in a chemical equation means only that time passes.
B. To balance a chemical equation you use coefficients in front of each species; you do NOT change the subscripts.
C. Balancing a chemical equation means making sure that the reactants and products are the same substances.
D. In a balanced equation the number of each kind of atom is the same in the reactants as in the products.
E. The fundamental reason for balancing a chemical equation is the Law of Conservation of Matter.