The Distinctive Color of a Reflection Nebula Is

The distinctive color of a reflection nebula is

A) light of all colors predominantly in the red part of the spectrum, emitted by cool stars and reflected by crystals of water ice surrounding the stars.
B) several specific colors, resulting from fluorescence of atoms excited by ultraviolet radiation emitted by hot stars.
C) blue, caused by the scattering of light from dust grains.
D) red, resulting from the emission of light from hydrogen gas.