What is the maximum rating of a Transition Area in terms of altitude above ground level?

The correct answer regarding the maximum rating of a Transition Area in terms of altitude above ground level is 700 feet AGL. Transition Areas are generally designed to facilitate the transition of aircraft between the terminal airspace and the enroute structure. Specifically, they provide controlled airspace where visual flight rules (VFR) and instrument flight rules (IFR) can coexist safely.

In this context, a Transition Area is meant to ensure that aircraft operating under VFR can safely navigate through areas where IFR traffic is also present. The altitude limit is set at 700 feet AGL because it allows a buffer between VFR operations and controlled IFR activity, ensuring that aircraft remain safely separated and that the airspace remains organized. This altitude reflects typical operational limits imposed to maintain safety standards in busy airspaces.

Other options do not correspond to the standard definitions established for Transition Areas in aviation regulations, as they either exceed the safe operational thresholds or do not align with the specific purpose of managing airspace transitions for both VFR and IFR flights.