When can a marker stop a bowl from a neighbouring rink?

The scenario deals with the responsibilities of a marker in the game of bowls, specifically in regard to stopping a bowl from an adjacent rink. The correct choice indicates that a marker can stop a bowl if it could affect any jack or bowl that is at rest.

In this context, the primary concern is to ensure the integrity of the game and the positions of all bowls and the jack. If a bowl from a neighboring rink has the potential to collide with or displace these objects, it poses a risk to the ongoing play. Therefore, the marker is justified in intervening to maintain the fair play and order of the game. This intervention is crucial to avoid disrupting the positions that are necessary for scoring or further gameplay on the affected rink.

In contrast, stopping a bowl during dead ends or solely due to safety risks may not encompass all scenarios where intervention is warranted. For instance, a bowl could be on a trajectory to interfere with a rest position without necessarily causing a safety hazard. Therefore, the focus on the potential impact on the game itself justifies why the marker has the authority to stop the bowl under those specific circumstances.