If a Comet's Ion Tail Is Pointing Perpendicular to Its

Multiple Choice

If a comet's ion tail is pointing perpendicular to its direction of travel, the comet is

A) moving closer to the Sun.
B) close to or at perihelion.
C) close to or at aphelion.
D) moving away from the Sun.
E) A comet's tail never points perpendicular to its motion.