Why Does the Dust Tail Separate from the Ion Tail

Multiple Choice

Why does the dust tail separate from the ion tail?

A) The dust is not ionized,so it is not affected by the solar wind.
B) Dust cannot sublimate as ice can,so it cannot form a tail as easily.
C) The dust tail forms on the leading side of the nucleus,whereas the gas tail forms on the opposite side.
D) Dust is more massive than ions,so it accelerates less.