What Effect Does Interstellar Dust Have on the Apparent Color

What effect does interstellar dust have on the apparent color of a star seen through the dust?

A) The dust makes the star look brighter than it really is, but leaves the color of the star unchanged.
B) The dust makes the star look bluer than it really is.
C) The dust makes the star look fainter than it really is, but leaves the color of the star unchanged.
D) The dust makes the star look redder than it really is.