The Aphelia (Farthest Distances from the Sun) of the Orbits

The aphelia (farthest distances from the Sun) of the orbits of periodic comets are

A) all located far beyond the orbit of Pluto.
B) mostly confined to the region between Mars and Jupiter, although some comets have orbits that reach beyond the orbit of Pluto.
C) always closer to the Sun than the orbit of Pluto.
D) located anywhere from inside the orbit of Pluto to as far as 100,000 au from the Sun.