Which art movement was started as a form of protest over the horrors of World War I?

A.
pop art
B.
postmodernism
C.
Dadaism

i would think b and c

a chromatic scale uses the twelve tones of the octave, while a regular scale only uses eight, or seven different notes (as the first note is played twice)

because of the importance of consistency in data collection. but we have to evaluate the resource or information, and not just accept what is posted online since information available on the internet is not regulated for quality or accuracy.