In a Singles game, what is the role of the marker when players are uncertain about the distance a jack has travelled?

In a Singles game, when players are uncertain about the distance a jack has travelled, the correct role of the marker is to intervene and check the distance of the jack. The marker is responsible for assisting players during the game, which can include measuring the distance that the jack has moved. By doing so, the marker ensures clarity in the play and helps maintain the flow of the game.

If the marker verifies that the jack is within the legal distance, the game can continue without unnecessary interruptions. This action emphasizes the marker’s role in facilitating the proper conduct of the game and provides players with the necessary information to make informed decisions regarding their next moves.

Other options, such as leaving it to the players to decide to play, advising a replay, or asking the umpire for a ruling, do not directly address the responsibility and authority the marker has in measuring the distance. The marker's intervention is essential in resolving the uncertainty swiftly and maintaining the integrity of the match.