Question

A minor scale is usually said to create what type of mood? A. happy B. exciting C. angry D. sad

Answer 1

Music based on major scales is generally considered to be happy. So what if a composer wants to convey something sad? One way to express sadness in music is to use a minor key. 

Therefore, your answer is D. sad.

Answer 2

A minor scale is a scale in which the seventh note is raised one semitone both ascending and descending
A minor scale is usually said to create sad type of mood. It is perceived by us as if there was something wrong, hence sadness or restlessness.