Use the Following Figure to Answer the Question Below

Use the following figure to answer the question below.

Rate of an enzyme-catalyzed reaction as a function of varying reactant
concentration,with the concentration of enzyme constant.
-When is a reaction at chemical equilibrium?

A) when the reactants are at the same concentration as the products
B) when the forward and backward reactions occur at the same rate
C) when there is no reactant remaining
D) when there is no product remaining
E) A reaction never reaches chemical equilibrium.