Which of the following terms best describes this selection's genre?

What is it called when jazz musicians change or add chords to an existing chord progression?

a. Vamping b. Comping c. Third stream d. Reharmonization or substitution

What 1978 movie centered around the disco scene and had a popular disco soundtrack featuring music by the Bee Gees?

A. Animal House B. Grease C. Up in Smoke D. Saturday Night Fever