Before using a nonactive runway, the Local Controller must ________.

The correct answer emphasizes the importance of coordination with the Ground Controller before using a nonactive runway. This coordination is crucial for ensuring that all aircraft movements within the airport environment are well-managed and safe. The Ground Controller has the responsibility to oversee all ground traffic, which includes taxiing aircraft, and to ensure that the use of a nonactive runway does not conflict with other operations occurring at the airport, including the movement of aircraft on active runways.

This practice fosters clear communication and enhances safety by making sure all relevant parties are aware of the runway's status and any aircraft movements that are about to occur in that area. Proper coordination helps prevent accidents and ensures that air traffic is managed effectively, reducing the risk of runway incursions and other potential hazards.

In contrast, advising the pilot or gaining approval from a supervisor, while important steps in the broader communication chain, does not address the immediate requirement for coordination on the ground. Similarly, coordination with the Airport Manager, while potentially relevant for operational changes, is not the critical immediate action needed before utilizing a nonactive runway.