In the Reflection of a Beam of Light from a Flat

In the reflection of a beam of light from a flat surface, the relationship between the angle of incidence i between the perpendicular to the surface and the incident beam and the angle of reflection r between the perpendicular and the reflected beam is:

A) r is equal to 2i.
B) the reflected ray always follows the perpendicular direction from the reflecting surface.
C) r is equal to i/2.
D) r is equal to i.