What is the altitude range for Class C airspace from 5 to 10 NM out?

The chosen answer accurately reflects the altitude range associated with Class C airspace. Class C airspace typically extends from the surface up to 4,000 feet above the airport elevation within 5 to 10 nautical miles of the primary airport. This structure is designed to create a controlled environment that helps manage traffic in areas with moderate air traffic density while providing a buffer zone for aircraft operating in and out of the airport.

The reasoning behind this altitude designation involves ensuring that aircraft operations remain safe and organized in complex airspace environments. Pilots operating in Class C airspace are required to establish two-way radio communication with air traffic control, ensuring that they receive instructions and advisories as needed to maintain safety.

While the other options present different altitude figures, they do not align with the regulatory definitions for Class C airspace and therefore do not accurately capture the operational parameters that are essential for pilots flying within these zones.