Please choose the correct ending to complete the given sentence: River tubing: A person rides down a rapid on an inter tube in a group of friends on a rocky river. the people in the intertubes

Ending1: catch up to another tube and ride it in fast. Ending2: are helped along by a river guides in polo shirt. Ending3: pass through a series of suspended tubes and bouncing ramps. Ending4: stop and one gets off, while others come and goes quickly in bags.

Answer format: ending1/ending2/ending3/ending4