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The best answer is C) A Hungarian national style
Bartok was interested in including a Hungarian national identity in his music, and establishing a distinctly Hungarian style. Toward this effort, he traveled the Hungarian countryside in the early 1900s to explore folk music and other aspects of the Hungarian musical tradition.
The concept behind The Rite of Spring, developed by Roerich from Stravinsky's outline idea, is suggested by its subtitle, "Pictures of Pagan Russia in Two Parts"; the scenario depicts various primitive rituals celebrating the advent of spring, after which a young girl is chosen as a sacrificial victim and dances
By the looks of the artwork, i'd have to go with A.(<span>nonrepresentational)</span>