Answer:
B.
Explanation:
The performance metric that would incentivize this would be one that measures timeliness of the flight, where a flight is considered "on time" as long as the flight is boarded and away from the gate by the scheduled departure time. This is because the time it takes for the plane to be boarded and ready for departure can vary and ultimately depends on many factors. Once the plane is completely boarded and away from the gate, the rest of the variables that affect the plane's ETA can be easily calculated by flight control and therefore can be considered as "on time"