What does Class C airspace generally encompass?

Class C airspace is typically associated with major airports that have an operating radar approach control service. This type of airspace is designed to accommodate the high volume of air traffic that is common in the vicinity of larger airports, ensuring safe and efficient aircraft operations.

Class C airspace generally extends from the surface up to 4,000 feet above the airport elevation, usually surrounding the airspace up to 10 nautical miles from the airport. The radar approach control service provided in this airspace is essential for maintaining separation between arriving and departing aircraft, as well as providing traffic advisories to pilots flying in the vicinity.

The other options do not accurately describe Class C airspace. Small airports typically fall under different classifications, such as Class D. Airspace above 10,000 feet is not exclusively Class C; it could encompass various types of airspace, including Class A and Class E. Uncontrolled airspace refers to areas where air traffic control does not provide services, which is in contrast to the controlled environment that exists in Class C airspace, further emphasizing the correct choice.