When a Light Ray Meets an Interface Between Two Media

Multiple Choice

When a light ray meets an interface between two media, how does the angle of refraction (assuming there is a transmitted ray) compare to the angle of incidence?

A) The angle of refraction is always less than the angle of incidence.
B) The angle of refraction is always greater than the angle of incidence.
C) It may be greater than, equal to, or less than the angle of incidence.
D) The angles are equal.