2. A mass m is attached to a spring with spring constant k (the other end of the spring is Exed). The mass of the spring is negligible. When the mass moves at velocity v, there is a drag force -bu acting on the mass. Which figure describes the displacement x of the mass as a function of time for some initial condition under the condition that the oscillator is overdamped?(A)(B)(C)(D)(E) none of the above