Schoenberg created a 12-tone system for composition that makes every note of equal importance. this new system is known as tonality primitivism atonality serialism

I think the correct answer would be the last option. The 12 tone system for composition that was created by Schoenberg is called serialism. It is also known as dodecaphony. This system was made to ensure that all of the 12 notes in the chromatic scale are used as often as one with another note in a music piece and preventing on the emphasis of a particular note.