Which of the following is considered a landmark of Greek dramatic tragedy?

In his Les Demoiselles d'Avignon, Pablo Picasso demonstrates an affinity with Paul Gauguin in his

a. discovery of the "primitive." b. penchant for angularity. c. use of Barcelona street life as a motif. d. Interest in African masks.

What is the term for the simultaneous or near simultaneous sounding of two pitches a half step apart?

a) cross relation b) musica ficta c) mixed signature d) tetrachord