Which following is NOT a characteristic of major airlines?

The correct answer identifies a characteristic that is not typical of major airlines. Major airlines are known for their extensive operations that include high annual revenues, substantial route networks, and large numbers of employees, all of which are essential to maintaining their extensive operations and service capabilities.

Utilization of small aircraft, on the other hand, is generally not a defining characteristic of major airlines. Instead, they primarily operate larger aircraft designed for high-capacity routes, allowing them to maximize their revenues from commercial operations. While major airlines may use small aircraft for specific short-haul routes or regional service, their core fleet typically comprises larger jets that can accommodate significant passenger volumes over long distances. Thus, option C correctly identifies a characteristic that is less associated with major airline operations compared to the other choices provided.