The scale has a bright, cheery tonality. minor major key signature sharp

"The major scale has a bright, cheery tonality. minor major key signature sharp"

Explanation:

The options given are:

Minor, major, key, signature, sharp.

The only ones that are real scales are minor and major, and the other 3 aren't.

The major scale is the most standard scale, is usually used for "happier" pieces, while the minor scale is usually used for "sader" pieces.

So the only option that makes sense with the sentence is the major scale.