Which class of airspace is classified as 'Everywhere' from 700 ft AGL to 17,999 MSL?

The correct answer is Class E airspace, which is classified as "everywhere" from 700 feet above ground level (AGL) to 17,999 feet mean sea level (MSL). Class E airspace typically serves as controlled airspace that provides a transition between the less regulated Class G (uncontrolled) airspace and the more heavily regulated Class A airspace, which starts at 18,000 feet MSL.

Class E airspace is established to ensure that there are appropriate conditions for IFR (Instrument Flight Rules) operations and to facilitate a controlled environment for pilots flying under both visual and instrument conditions. This type of airspace can extend upward from the surface in some areas, but in general, from 700 feet AGL, Class E is the primary airspace classification encountered before entering Class A.

In contrast, Class A airspace is located above 18,000 feet MSL and is used primarily for high-altitude, high-speed jet traffic. Class G airspace is uncontrolled and typically exists below 1,200 feet AGL or where Class E begins, allowing for more freedom of flight but with fewer regulations. Class D airspace surrounds airports with an operational control tower and typically extends from the surface up to