The overall purpose of the upper two voices in this composition ...

[big1devin]

The overall purpose of the upper two voices in this composition is to provide contrast with the lower voices. This is achieved by having the upper voices?
 
  a) present entirely different musical material at a comparatively faster rhythmic rate
  b) state the material of the lower voices in augmentation, that is longer note values
  c) state the material of the lower voices in diminution, that is faster note values
  d) present entirely different musical material at a comparatively slower rhythmic rate

Question 2

This selection is based on phrase units of how many measures?
 
  a) 4 or 8
  b) 12 or 16
  c) 8 or 10
  d) 6 or 8

[stallen]

Answer to Question 1

a

Answer to Question 2

a

[big1devin]

TY

[stallen]

You're welcome