What Characteristic of Long-Period Comets Suggest They Come Directly from the Oort

Multiple Choice

What characteristic of long-period comets suggest they come directly from the Oort cloud?

A) They have longer dust tails than short-period comets.
B) Their orbits have random inclinations with respect to the ecliptic plane.
C) Their orbits are nearly circular.
D) They tend to appear larger in diameter than short-period comets.