Which agency is responsible for the promotion, regulation, and safety of civil aviation and safe use of airspace shared by civil and military aircraft?

• A. National Transportation Safety Board
• B. Air Traffic Control
• C. Federal Aviation Administration
• D. Regional Airline Association

Answer: (C)

The key idea is identifying the federal body that both promotes safe, efficient civil aviation and regulates the industry, including managing the airspace used by both civilians and the military. The Federal Aviation Administration fits this role precisely: it sets safety standards, certifies pilots and aircraft, regulates airlines and airports, and coordinates the use of airspace in collaboration with the military to ensure safe mixed-use operations. The other options don’t match this combination: the NTSB focuses on investigating accidents and issuing safety recommendations rather than regulation or airspace management; Air Traffic Control provides the actual service of guiding aircraft but is not the regulatory agency itself; and a Regional Airline Association is a trade group, not a government regulator.