Arnold Schoenberg created his 12-tone system to .a. give his Sprechstimme (speech song) a wider range. b. abandon the idea of tonality. c. show that every tone was equal to every other. d. reflect song with more explosive force.

C. Show that every tone was equal to every other

Explanation:

Arnold Schoenberg's 12 tone system was that all 12 notes of the chromatic scale are sounded as often as one another in a piece of music, while not giving emphasis to one not rather than another.