Triple

Target class: missile warning station
Context triple: [Clear Air Force Station, instanceOf, missile warning station]

• A. missile warning system
  A missile warning system is a defense mechanism that detects, tracks, and alerts relevant entities to incoming missile threats to enable timely protective or countermeasure responses.
• B. missile defense radar chosen
  A missile defense radar is a specialized sensor system that detects, tracks, and characterizes incoming missiles to support timely interception and defense actions.
• C. ground-based air defense system
  A ground-based air defense system is a coordinated set of land-deployed sensors, command-and-control elements, and weapon platforms designed to detect, track, and engage airborne threats such as aircraft, missiles, and drones.
• D. satellite surveillance base
  A satellite surveillance base is a secure ground facility equipped with advanced antennas, control systems, and data-processing infrastructure used to monitor, receive, analyze, and manage information from surveillance satellites orbiting the Earth.
• E. missile defense brigade
  A missile defense brigade is a military unit responsible for detecting, tracking, and intercepting incoming missile threats to protect designated forces, assets, and territories.
• F. None of above.