In the mid-20th century, the music that became associated with political protest and social justice was

Which statement best describes the music of Alban Berg's opera Wozzeck?

a. based on traditional American folk songs b. employed improvisation and a swinging rhythm c. written after the composer left New Orleans for Chicago d. created a disturbing mood by atonal harmonies and dissonance

The main keyboard instruments of the baroque period were the organ and the ________.

A. piano B. clavichord C. accordion D. harpsichord