A block of mass \(m\) is attached to an ideal horizontal spring of spring constant \(k\) on a frictionless horizontal surface. The block oscillates in simple harmonic motion with amplitude \(x_{\max}\) about the equilibrium position at \(x = 0\). At a particular instant, the block is at position \(x = +\dfrac{1}{2}x_{\max}\) and moving in the \(-x\)-direction toward the equilibrium position.

Which row in the table correctly identifies the direction of the net force on the block and compares the kinetic energy \(K\) of the block to the elastic potential energy \(U_s\) of the spring-block system at this position?

	Direction of Net Force	Relationship Between \(K\) and \(U_s\)
Row A	In the \(+x\)-direction	\(K = U_s\)
Row B	In the \(+x\)-direction	\(K > U_s\)
Row C	In the \(-x\)-direction	\(K = U_s\)
Row D	In the \(-x\)-direction	\(K > U_s\)