Which of the following statements correctly describes a chemical reaction that has achieved equilibrium? A. the concentrations of the products are equal to the initial concentrations of the reactants.

B. the concentrations of the reactants are equal to the concentrations of the products.

C. there are no changes in the concentrations of reactants or products.

D. reactant concentrations are continually decreasing and product concentrations are continually increasing.

E. the products and reactants have stopped reacting.