The correct answer is: The forward reaction is happening faster than the reverse reaction.
In a system at equilibrium, the rates of the forward and reverse reactions are equal. If the forward reaction is happening faster than the reverse reaction, it indicates that the system is not at equilibrium, as the concentrations of reactants and products are still changing.
The other options suggest different scenarios but do not specifically indicate that the system is not at equilibrium in the same clear way as option 2 does.