Which of the following constitutes Class D airspace conditions?

Class D airspace is defined as airspace that generally surrounds airports with an operational control tower and typically extends up to 2,500 feet above the airport elevation. The distinction of Class D from Class C airspace lies primarily in the volume of IFR (Instrument Flight Rules) operations and the level of communication required.

The correct choice indicates that the conditions in Class D are similar to Class C, but with fewer IFR operations. This highlights the essential characteristic of Class D airspace, where there is an operational control tower, yet the amount of air traffic, particularly IFR traffic, is less intense than that found in Class C airspace. While pilots in Class D airspace are still required to establish communication with the tower prior to entering, the airspace is less congested.

The other options present characteristics that do not apply to Class D airspace. Class D airspace does not exist at uncontrolled airports, as its defining feature is the presence of a control tower. Consequently, while it may share some operational similarities with Class C, it is not accurate to say that it has no operational control tower or that all airports within Class D airspace are uncontrolled. Instead, the presence of a control tower and a typically lower volume of IFR operations clearly define the