What must occur during intersecting runway separation?

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During intersecting runway separation, the process requires that the first aircraft has exited the intersection. This is crucial to maintaining safety and avoiding runway incursions. Intersecting runways are areas where one runway crosses over another, and to ensure a safe landing or takeoff operation, it is vital that one aircraft fully clears the intersection before another aircraft can be allowed in that space. This helps to prevent any potential collisions or conflicts between the two aircraft utilizing the intersecting runways.

The significance of this procedure emphasizes the responsibility of air traffic control to manage traffic effectively, ensuring clear communication and situational awareness for pilots operating in these areas. Without ensuring that the first aircraft has vacated the intersection, the risk of an incident increases significantly, thereby highlighting why option B is the appropriate choice in this scenario.