Answer:
your answer will be
c. one came close when it flew by earth
Explanation:
A near-Earth object (NEO) is any small Solar System body whose orbit brings it to proximity with Earth. By convention, a Solar System body is a NEO if its closest approach to the Sun (perihelion) is less than 1.3 astronomical units (AU). ... Most known PHOs and NEOs are asteroids, but a small fraction are comets.
