Please choose the correct ending to complete the given sentence: River tubing: A woman walks to the bank of a river holding a camera. Suddenly, two men appears sailing in inflatable boats while the woman takes pictures. other people

Ending1: is rowing in the boats. Ending2: sail on individual boats in the choppy waters in the river. Ending3: sail in inflatable boats while standing on a bridge. Ending4: are shown riding the boats and a person who saves a man's life.

Answer format: ending1/ending2/ending3/ending4