When approach control receives scramble orders, it shall relay this information to which of the following?

When approach control receives scramble orders, the correct action is to relay this information to other affected Air Traffic Control (ATC) facilities. This is essential because scramble orders typically involve military aircraft and need immediate coordination to ensure safe and effective operations within the airspace.

By informing other ATC facilities, approach control ensures that all relevant entities are aware of the situation, which helps maintain situational awareness and prevents potential conflicts with civilian or other military aircraft. Effective communication among ATC facilities facilitates timely response and adequate management of air traffic when such urgent missions are initiated.

The other choices, while potentially relevant in specific contexts, do not encompass the broader necessity of ensuring all affected ATC facilities are informed, which is crucial for maintaining safety and operational efficiency in controlled airspace.