Please choose the correct ending to complete the given sentence: Using parallel bars: A man is on a physical therapy rail in a building. he

Ending1: bounces around slowly as he goes down, going in circles. Ending2: is shown working out on a line. Ending3: makes several small jumps while on the rails. Ending4: uses the railing to help himself guide and walk forward.

Answer format: ending1/ending2/ending3/ending4