What Statement Below Best Describes the Behavior of Light Encountering

Multiple Choice

What statement below best describes the behavior of light encountering the objective lens of a refracting telescope?

A) All light is absorbed as it travels though a dense,transparent material.
B) White light from astronomical objects is emitted by the lens.
C) Light rays are focussed to form an image after they pass through the lens which is of different optical density.
D) Light rays are focussed to form an image after they reflect off the lens.