Which of the following is a characteristic feature of jazz music?

During the era of the Vietnam War, the avant-garde in Europe and the United States was preoccupied with communal performance groups, environmental staging, and angry political messages

a. true b. false

Art Blakey's drumming on this selection could best be described as

a. Hard driving and swinging b. Soft and restrained c. Providing subtle accompaniment d. Obscuring the beat