This is a test of commonsense with single/multi-choices. Complete the next sentence:

. a referee wearing a white shirt in a boxing match

Available options: -- 5-nine walks up to a person swings a club and hits a man standing on the floor.. -- demonstrates a series of punches.. -- starts a boxing match.. -- points to a bantam-tam behind him and a referee out in front of..
The answer is:
starts a boxing match.