Select all that apply.

the twelve tone technique

a. ensures that the 12 notes are given equal importance
b. ensures that the music will be on key
c. is characterized by the works of arnold schoenberg
d. is part of expressionism music

A. Ensures that the 12 notes are given equal importance

Explanation:

The twelve tone technique is a form of atonal music, with a technique of composition where the twelve notes of the chromatic scale are treated as equivalent, that is, subject to an ordered relation that does not establish hierarchy between the notes. Current traditional and popular music is usually tonal.

The founder of this technique was Arnold Schönberg. One of the main rules is that no sound is repeated until all the tones have sounded.

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.