Please help me for an art test are Colors that sit side by side on the color wheel and have a common hue. Violet, red-violet, and red are colors. Select one or more:
a. Monochromatic
b. Complementary
c. Analogous
d. Arbitrary Color

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.  

based on the images pictured above, the major difference between the two cathedrals: the cathedral of notre dame and the amiens cathedral, is that the cathedral of notre dame emphasizes the horizontal lines while the amiens cathedral emphasizes the vertical lines.