Which of the following movements mocked and challenged classical notions of people's behavior and values, particularly those who were materialists and nationalists? a. surrealism b. art deco c. dada d. modernism

i think its the dada art movement.

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.