Please choose the correct ending to complete the given sentence: River tubing: A group is lazily floating on intertubes in a river. the people

Ending1: are being pulled by a mechanism. Ending2: are holding hands so they stay together. Ending3: are shown from several angles and they have the paddles in their hands. Ending4: are pulled through a tunnel by the men.

Answer format: ending1/ending2/ending3/ending4