Music questions please help

12. Which group was important to rock and roll in the 1970s and 1980s?
A. Led Zeppelin
B. N Sync
C. The Kingston Trio
D. Oasis

13. Which style of dance music, named after a French word, appeared in the 1970s and was influenced by funk, soul, and salsa?
A. tango
B. techno
C. swing
D. disco

14. Which list includes rock music subgenres that appeared in the 1990s and early twenty-first century?
A. punk rock, heavy metal, and grunge
B. pop rock, glam rock, and emo
C. boy bands, grunge, and emo
D. Funk, pop rock, and heavy metal

15. Britney Spears, Christina Aguilera, and Jessica Simpson represent which music style of the 1990s
A. glam rock
B. alternative rock
C. teen pop
D. emo

16. Which style of music has highly amplified rock music featuring powerful guitar and drums with distorted sound?

A. pop rock
B. emo
C. heavy metal
D. boy bands

18. How does Billboard magazine determine its hot 100 list?
A. sales of music CDs and DVDs
B. video airplay on MTV and VH1
C. music downloads
D. radio airplay and the Neilson SoundScan report

19. Why do laws make it illegal to photocopy sheet music and duplicate recorded music without permission?
A. unauthorized duplication of music harms artists, music retailers, and consumers
B. instrument manufacturers could not stay in business if people duplicated music without permission
C. duplicating music harms music website developers
D. The government wanted to curtail music production by limiting public access to it