A block of mass \(m\) is attached to an ideal horizontal spring with spring constant \(k\) on a frictionless surface. The block is pulled to a displacement \(A\) from its equilibrium position and released from rest, undergoing simple harmonic motion. A student uses a motion sensor to analyze the system and intends to create an energy bar chart for the moment the block is at position \(x = \dfrac{A}{2}\).

Which of the following energy bar charts best represents the kinetic energy \(K\) of the block and the elastic potential energy \(U_s\) of the spring-block system at this position?