During the reign of Tsar Nicholas II (1894-1917), arts and letters entered a prosperous time now commonly called the Silver Age, a period of:

A contemporary musical deals with the formerly off-limits topic of mental illness

Indicate whether the statement is true or false.

When notes sounded together tend to be grating or unpleasant, the resulting sound is called

A. harmony B. timbre C. dissonance D. consonance