Triple

Target class: spacecraft payload adapter
Context triple: [Long Duration Propulsive EELV Secondary Payload Adapter, instanceOf, spacecraft payload adapter]

• A. ISS external payload
  An ISS external payload is a scientific or technological instrument package mounted on the outside of the International Space Station to conduct experiments, observations, or demonstrations in the space environment.
• B. spacecraft berthing mechanism
  A spacecraft berthing mechanism is a structural and mechanical interface system that enables two spacecraft or modules to be precisely aligned, securely joined, and later separated while maintaining required load paths and connections for power, data, and environmental control.
• C. spacecraft docking system
  A spacecraft docking system is a coordinated assembly of mechanical interfaces, sensors, and control software that enables two spacecraft to safely approach, align, and connect in orbit for transfer of crew, cargo, or resources.
• D. Spacelab subsystem
  A Spacelab subsystem is a distinct functional component of the Spacelab space laboratory that performs specialized tasks—such as power, life support, data handling, or experiment support—to enable and sustain scientific operations in orbit.
• E. space station resupply vehicle
  A space station resupply vehicle is a spacecraft designed to transport cargo, equipment, and sometimes crew to and from an orbiting space station, supporting its ongoing operations and maintenance.
• F. None of above. chosen