Which of the following describes the requirement when entering Class E airspace at the surface?

The requirement when entering Class E airspace at the surface is that no permission is needed from Air Traffic Control (ATC). Class E airspace typically serves as a transition area for aircraft moving into or out of controlled airspace and does not have the same stringent entry requirements as some other airspace classes, such as Class B or Class C, where ATC clearance is necessary.

In Class E airspace, especially the type that extends from the surface, pilots are not required to communicate with ATC nor obtain explicit permission before entering. However, communication with ATC might be beneficial for situational awareness, and flying in a visual flight rules (VFR) manner is generally expected.

It's important for pilots to understand operational procedures and the implications of entering such airspace, including maintaining visibility with surrounding traffic and awareness of potential traffic advisories. Overall, while notifying nearby aircraft, filing a flight plan, or requesting permission might enhance safety and organization, they are not requirements when entering Class E airspace at the surface.