Why Does the Plasma Tail of a Comet Always Point

Multiple Choice

Why does the plasma tail of a comet always point away from the Sun?

A) The solar wind electromagnetically "blows" the ions directly away from the Sun.
B) Radiation pressure from the Sun's light pushes the ions away.
C) The conservation of the angular momentum of the tail keeps it always pointing away from the Sun.
D) Gases from the comet,heated by the Sun,push the tail away from the Sun.
E) It is allergic to sunlight.