List the different stages involved in scientific problem solving

Enzymes affect the reactions in living cells by changing the

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.

Ab c or d ? i’m not sure what the answer is