Please choose the correct ending to complete the given sentence: River tubing: A large river is seen followed by a person riding down in a tube. another person

Ending1: is seen riding down the river on the tube and laughing with one another. Ending2: is also seen riding in a tube. Ending3: ride down several more times. Ending4: rides down with a group of tubes as he finds a bridge and uses a tube to navigate.

Answer format: ending1/ending2/ending3/ending4