Katharsis reflects the purging of emotions from a tragedy

In the second movement of Haydn's String Quartet, op. 76, no. 3, Haydn __________

a) changes texture throughout b) presents the theme in a polyphonic texture for each variation c) uses only monophony throughout d) keeps the melody in Violin 1 throughout

Which composer considered silence non-existent, and created an entire work of "silence" to prove the point?

A. John Cage. B. Pauline Oliveros. C. Morton Feldman. D. Harry Partch.