Identify the major key that has 5 sharps or 7 flats.

The major key that contains 5 sharps is B Major. In music theory, each major key has a specific number of sharps or flats based on its position in the circle of fifths. B Major, positioned two steps up from the key of G Major, has five sharps in its key signature, specifically F#, C#, G#, D#, and A#.

Understanding key signatures is crucial for recognizing how these sharps and flats influence the overall sound of the music. The B Major scale consists of the notes B, C#, D#, E, F#, G#, and A#, which align perfectly with the key signature's sharps.

For comparison, other keys mentioned, such as D Major and A Major, have fewer sharps (D Major has 2, and A Major has 3), while E Major has 4 sharps. None of these keys match the specification of having 5 sharps, confirming that B Major is indeed the correct choice in this context. Additionally, while a key with 7 flats corresponds to C♭ Major, that's not applicable to the options given.