What happens next?

Then he climbs on the slackline and balances himself as he jumps up and down on the flat webbing. he

pick from the following.
(A). flips down the slackline and lands on the top mat..
(B). continues to bounce up and down while trying to balance on the webbing..
(C). swings back and forth and then releases the rope, and then lands back on the mat..
(D). is eventually able to get himself over the slackline parallel to the ground..
(B).