Please choose the correct ending to complete the given sentence: Doing kickboxing: . a referee wearing a white shirt in a boxing match

Ending1: 5-nine walks up to a person swings a club and hits a man standing on the floor. Ending2: demonstrates a series of punches. Ending3: starts a boxing match. Ending4: points to a bantam-tam behind him and a referee out in front of.

Answer format: ending1/ending2/ending3/ending4