In the following figure, a motorcycle stuntman jumps horizontally from a point 1.25 m above the ground and lands 10 m from the jumping point \( \left[\mathrm{g}=9.81 \mathrm{~ms}^{-2}\right] \) . What was his velocity at the time of jump?

A \( 23.21 \mathrm{~ms}^{-1} \)

B \( 18.76 \mathrm{~ms}^{-1} \)

C \( 21.58 \mathrm{~ms}^{-1} \)