A heavy, uniform wire of mass \(M\) and length \(L\) hangs vertically from a rigid support. A small block of mass \(m\) is attached to the bottom end of the wire. A student generates a transverse wave pulse near the bottom of the wire, which travels upward toward the support. Which of the following expressions represents the ratio \(\dfrac{v_{\text{top}}}{v_{\text{bottom}}}\) of the pulse speed at the top of the wire to the pulse speed at the bottom of the wire?