The singing of nonsense syllables during improvised solos is called Scat singing.
"Erlkonig" was composed by Franz Schubert (and Carl Czerny but it wasnt in the choices).
Hope these are correct :) have a great day
The first opera to win widespread acclaim was D. Purcell's Dido and Aeneas.
B. piano because it’s more of an instrumental and resemble to concentrate
