Which description best defines techno music?

Techno is a genre of electronic dance music that is characterized by a repetitive four on the floor beat which is generally produced for use in a continuous DJ set. The central rhythm is often in common time (4/4), while the tempo typically varies between 120 and 150 beats per minute (bpm).

Explanation:

I'm in the same class (Music Appreciation)

including the octave, the answer would 8 notes in a major scale with one note being played twice. ex) c major scale includes: c, d, e, f, g, a, b, c

notice that c is played twice

however, if you were to ask me how many different notes are in a major scale- the answer would be 7.