Please choose the correct ending to complete the given sentence: River tubing: . a river with white rapids and a group of tubers wearing yellow helmets

Ending1: and roped one of the tubers up on a rock standing on top of the waterfall place. Ending2: float in the distance. Ending3: and men wearing grey jumpsuits assemble on a bridge. Ending4: and reading caps have seen the river and are talking.

Answer format: ending1/ending2/ending3/ending4