What Statement Below Best Describes the Refraction of Light

Multiple Choice

What statement below best describes the refraction of light?

A) The absorption of light as it travels though a dense, transparent material.
B) The spreading out of white light according to wavelength.
C) The change in direction of a light ray as it passes to a medium of different optical density.
D) The change in direction of a ray of light as it reflects off a surface.