Which composers are recognized for using the 12-tone technique?

The 12-tone technique, developed by Arnold Schoenberg, is a method of composition that utilizes all twelve notes of the chromatic scale in a systematic way, ensuring that no single note is emphasized. This technique influenced several composers who are recognized for its use, particularly in the second Viennese school and beyond.

The choice that includes Webern, Berg, Boulez, Nono, and Stockhausen accurately reflects composers who have either directly utilized the 12-tone technique in their works or have been significantly influenced by it. Anton Webern and Alban Berg were both students of Schoenberg and applied the 12-tone technique in their compositions, contributing to its evolution. Pierre Boulez, Luigi Nono, and Karlheinz Stockhausen were significant figures in the post-World War II avant-garde movement, where the 12-tone method was commonly applied and expanded upon in their works.

Therefore, this selection represents a clear line of succession and innovation stemming from Schoenberg's original method, which is why it is the correct answer.