Final answer:
Controlled Firing Areas (CFAs) contain activities that are hazardous to nonparticipating aircraft, and they are managed to stop hazardous activities if there is an aircraft nearby. c) Hazardous to nonparticipating aircraft
Step-by-step explanation:
CFAs, or Controlled Firing Areas, contain activities that are hazardous to nonparticipating aircraft. These areas are managed so that activities within, such as live firing exercises or testing, do not pose a risk to nonparticipants. The activities are halted whenever there is a chance that an aircraft could enter the area.
This ensures safety and eliminates the need for widespread clearance or restrictions. However, it is the responsibility of pilots to be aware of CFAs during planning and to listen to ATC advisories while in flight. Unlike Prohibited or Restricted areas, CFAs are not charted because they are activated and managed in a way that should not affect nonparticipating traffic under normal circumstances.