Improvisation became a part of jazz as a. musicians began ...

[littleanan]

Improvisation became a part of jazz as
 
  a. musicians began taking liberties with the melodies.
  b. the chord progressions of various tunes grew more complex.
  c. fewer and fewer musicians could read music.
  d. musicians stopped filling in sounds to stretch out the music.

Question 2

Which formed the basis for the Basie band's musical arrangements?
 
  a. Several interweaving melodic lines
  b. Short repeating riffs
  c. Voicing across the sections
  d. Patterns from European classical music

[joshbk44]

Answer to Question 1

a

Answer to Question 2

b. Short repeating riffs