What type of non-Western music has influenced the work of the minimalist composer Philip Glass?

In addition to art songs, Schubert also wrote

a. symphonies, piano sonatas, and dozens of works for chamber ensemble. b. children's theater, collections of etudes, and music critiques. c. operas, oratorios, and morality plays. d. nothing; he only composed art songs.

The text defines swing as:

a. the dominance of the bass player in the jazz texture b. the strong offbeats of the chording instruments (piano, guitar, banjo, etc.) c. the sense of rhythmic play from the result of various kinds of rhythmic conflict d. the improvisation style of the front-line instruments