Please choose the correct ending to complete the given sentence: Rock climbing: A man is climbing up a rock wall. he

Ending1: starts by placing two large rocks on each side. Ending2: is kneeling down next to a large hole in the floor. Ending3: lays down on it and starts to work out. Ending4: jumps to the top and gives a thumbs up.

Answer format: ending1/ending2/ending3/ending4