Each of the six medieval rhythmic modes corresponds to a?

Which of the following may be seen as a reaction against atonality, primitivism, and expressionism?

a) impressionism b) Futurism c) twentieth-century musical neoclassicism d) organicism

Both Brahms and Wagner were regarded as the heirs apparent to Beethoven. How did this title fall upon them, and how did their music differ, yet bear similarities as well?

What will be an ideal response?