1. Which of the following is the primary reason for the development of new music style in the 20th century?
A. climate change C. rapid increase in population
B. invention of DNA D. rapid growth of technology

2. Which of the following is best describes as the music that involves sounds found in nature, distorted in various ways, and can be arranged in a new music?
A Classical Music C. Musique Concrete
B, JIL Music D. Pop Music

3. What musical equipment was used to play the composition Poeme Electroniques Brussels World's Fair?
A 100 Pianos C. 150 Synthesizers
B. 100 Violins D. 425 Loudspeakers​