Final answer:
Schoenberg: Kol Nidre, Op. 39 is an example of 20th-century Expressionism in music.
Explanation:
Schoenberg: Kol Nidre, Op. 39 belongs to the Twentieth Century style period. Arnold Schoenberg, a key figure in 20th-century music, developed the twelve-tone method and an atonal style, known as Expressionism, which rejected traditional tonality.
This departure from past practices is evident in works like Schoenberg's, where the focus was on dissonance, atonality, and complex compositional techniques that challenged conventional musical norms.
His approach influenced subsequent generations of composers, embodying the shift towards modernism and away from Romanticism in music during the early 1900s.
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