Please choose the correct ending to complete the given sentence: Using the rowing machine: An introduction comes onto the screen for a challenge involving a rowing machine. A man begins to row on a rowing machine as several people watch him work out. the video

Ending1: ends with the closing captions shown on the screen. Ending2: continues with information for baby ducks and swimming in the pool. Ending3: ends with him jogging off into the distance. Ending4: starts with him playing several different places overlaid across his screen.

Answer format: ending1/ending2/ending3/ending4