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

(a)

A hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space.

(b)

A spacecraft lands on another planet after making several orbital motions.

(c)

A missile is put into a stable orbit around the Earth and deorbits over a target on the Earth.

(d)

A spacecraft moves along a comet with the same speed and places a probe on its surface.