Which one of the following statements best reflects the idea behind the "Fractional Orbital Bombardment System" often talked about in media?

Answer: C. Fractional Orbital Bombardment System (FOBS) puts a missile into orbital trajectory around Earth and deorbits over a target. FOBS is a Soviet/Russian and Chinese nuclear weapons delivery concept developed since the 1960s. The launch vehicle puts a warhead into a LOW EARTH ORBIT (partial orbit, hence 'fractional'); the warhead is then DEORBITED over the target by retro-firing, allowing it to strike from an unexpected direction (e.g., approaching from the South Pole to attack North America). Why FOBS matters: it potentially defeats early-warning radars optimised to detect ballistic missile arcs over the North Pole. China's August 2021 test of a hypersonic glide vehicle on a FOBS-like trajectory raised major US concerns. Distractors fail: (A) Asteroid deflection is NEO defence, not FOBS. (B) Multi-orbit landing of spacecraft is normal orbital mechanics. (D) Comet rendezvous (like Rosetta-Philae) is a scientific mission, not a weapons system. Source: US DOD / Federation of American Scientists / Arms Control Association publications.