Which of the Following Conditions Is Not Found in a System

Which of the following conditions is not found in a system that is at equilibrium?

A) Reactants and products are being converted into one another continually
B) The forward rate of reaction is equal to the rate of the reverse reaction
C) The concentration of reactants is equal to the concentration of the products
D) The system is closed and isolated from its surroundings
E) The reaction can be represented by an equation with a double arrow