A Comet's Tail Always

A comet's tail always

A) points toward the nearest planet, attracted by the planet's gravity field as the comet passes by the planet.
B) trails behind the comet in its orbit and so points away from the Sun only while the comet is approaching the Sun.
C) points away from the Sun, regardless of the motion of the comet.
D) points toward the Sun because the tail is caused by jets of gases evaporated from the comet's nucleus on the side heated by the Sun.