The tail of a comet is directed away from the sun because

The correct answer is C because of two primary forces acting on the comet as it approaches the sun: solar radiation pressure and solar wind. Solar radiation pressure consists of photons emitted by the sun that exert physical pressure on the dust particles in the comet. Simultaneously, the solar wind, which is a stream of charged particles like electrons and protons, interacts with the gases in the comet. Together, these forces push the dust and ionized gases away from the sun in a radial direction. This causes the tail to always point away from the sun, regardless of the direction in which the comet is traveling. Options A, B, and D are incorrect because they rely on false gravitational, rotational, or static explanations.