Triple

Target class: crewed reentry vehicle concept
Context triple: [NASA HL-20 lifting-body design, instanceOf, crewed reentry vehicle concept]

• A. prototype re-entry vehicle
  A prototype re-entry vehicle is an experimental spacecraft or missile body designed to test and validate technologies, materials, and aerothermal performance for surviving high-speed descent through a planetary atmosphere.
• B. reusable spaceplane chosen
  A reusable spaceplane is a winged spacecraft designed to take off, operate, and land multiple times like an aircraft while transporting payloads or crew between Earth and space.
• C. ablative thermal protection system
  An ablative thermal protection system is a heat shield that protects a spacecraft by sacrificially charring, melting, and eroding material to absorb and carry away extreme reentry heat.
• D. fully reusable launch system
  A fully reusable launch system is a space launch architecture in which all major components (such as boosters, upper stages, and spacecraft) are recovered, refurbished, and flown again, minimizing expendable hardware and reducing per-launch costs.
• E. space capsule
  A space capsule is a small, often conical or cylindrical crew or cargo spacecraft designed to survive launch, spaceflight, reentry, and landing while protecting its occupants and equipment.
• F. None of above.