I'm stuck between A or D? Please help

QUESTION 9 Here we go again this time, d = 4.87 m. Suppose the block starts on the track at x = 0. What minimum initial velocity (moving to the right) must the block have such that it will leave the track at x = 0 and go into freefall? 06.92 m/s 13.36 m/s 4.89 m/s 9.78 m/s