12. Which of the following pertained to rock music that was more danceable, thus leading to the establishment of venues for public dancing? a. Ballads b. Disco c. Pop Music d. Rock and Roll 13. Who was the most popular solo performer of all time, and popularized several physically complicated dance techniques, such as the “Robot” and the “Moonwalk”? a. Michael Joseph Jackson b. Elvis Presley c. Frank Sinatra d. Bob Marley 14. These are percussion instruments that are either struck with a mallet or against one another. a. Membranophone b. Idiophones c. Lamellaphone d. Chordophones 15. These are instruments which have vibrating animal membranes used in drums. a. Membranophone b. Idiophones c. Lamellaphone d. Chordophones