Which of the Following Describes a Comet

Multiple Choice

Which of the following describes a comet?

A) moderate diameter (<10m) object originating from collisions of asteroids
B) large diameter (10m-1000km) object originating from belt between Jupiter and Mars
C) small diameter (<10 cm) object destroyed in Earth's atmosphere
D) variable-sized object that intersects the Earth's surface
E) icy object that appears to have a tail as it burns, originates from outside our solar system