The orbits of short period comets are : a. primarily in the plane of the ecliptic and can extend far out beyond the orbit of Pluto.
b. primarily in the plane of the ecliptic and confined to distances closer to the Sun than approximately the orbit of Pluto.
c. randomly oriented in the solar system and confined to distances closer to the Sun than approximately the orbit of Pluto.
d. randomly oriented in the solar system and can extend far beyond the orbit of Pluto.