A block of mass \(m\) on a horizontal frictionless surface is connected to an ideal spring of spring constant \(k\). At time \(t = 0\), the block is released from rest at displacement \(x = +A\) and executes simple harmonic motion with period \(T\). Which of the following graphs best represents the kinetic energy \(K\) (dashed curve) and the elastic potential energy \(U\) (solid curve) of the block-spring system as functions of time \(t\) from \(t = 0\) to \(t = T\)?