Which of these were artistic developments in the 20th century? A. Non-Western culture and philosophies had a huge effect on all of
the arts.
B. The United States began to shape world culture.
C. New technologies and materials inspired artists.
D. All of the above.

The answer is D.) All of the Above

Explanation:

A P E X

franz marc (d) was an artist during the expressionist 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.