A block of mass \(m\) on a horizontal surface is connected to an ideal spring of force constant \(k\), whose other end is fixed to a rigid vertical wall. The surface exerts a constant kinetic friction force of magnitude \(f_k = \mu_k m g\) on the block, and air resistance is negligible. The block is pulled to an initial displacement \(x = x_0\) (where \(k x_0 > \mu_s m g\)) and released from rest at time \(t = 0\). Which of the following graphs best represents the position \(x\) of the block as a function of time \(t\) as it oscillates?