Which statement is true regarding the management of aircraft operations in controlled airspace?

The correct choice highlights an important requirement in controlled airspace regarding aircraft operations. In many types of controlled airspace, especially as defined by aviation regulations, aircraft are required to operate with their transponders on and set to the appropriate squawk code. This is essential for air traffic control (ATC) to maintain situational awareness and manage the safety of all aircraft within that airspace. By broadcasting a transponder signal, an aircraft's position, altitude, and identification are made visible to ATC and other aircraft, enhancing safety and efficiency in crowded skies.

The requirement for transponders particularly applies to specific airspace classes, like Class A, B, and C airspace, where ATC relies heavily on transponder data.

In contrast, the other options do not accurately reflect the established regulations or practices in controlled airspace. Weight and balance documents are important for safe aircraft operations but are not a requirement for all aircraft in controlled airspace. Communication with ATC is not optional; it is necessary for proper coordination and safety. While visual flight rules (VFR) operations may take place in controlled airspace, not all operations are required to be under VFR and can also include instrument flight rules (IFR) depending on the circumstances