What specific airspace must a remote pilot operating under Part 107 obtain permission to enter?

A remote pilot operating under Part 107 must obtain permission to enter specific controlled airspace, primarily focusing on airspace around airports that is designated for safety and traffic management. The correct choice highlights that permission is required for Class B, Class D, and Class E surface areas.

Class B airspace surrounds the busiest airports and requires that pilots obtain ATC clearance before entering, ensuring air traffic control can manage the high density of aircraft. Class D airspace, found around smaller airports, also requires communication with ATC before entry, which helps maintain a safe operating environment given the proximity to other aircraft. Class E surface area designations may not universally require permission like Class B and D, but they can include airports where more traffic and operational protocols are in place.

Understanding these airspace classifications confirms that remote pilots must prioritize safety and compliance with FAA regulations by seeking the appropriate authorizations for these controlled areas to prevent potential hazards in the airspace system.