I believe the correct answers are B, C, and D.
Colors create a mood in an artwork. They can't possibly neutralize it. Even if we tried to create a sense of monotony or gloom, it would still be a kind of mood. Now, there are different kinds of moods: energetic (for which we are more likely to use brighter colors, of course), or relaxed (darker and cooler colors, such as blue, green, violet, grey).
