is an Italian term for graduations of light and shadow to produce a hazy effect. This painting is by Correggio called, Assumption of the Virgin. Inspired by Leonardo da Vinci's spotlighting effects of illumination of sfumato, Correggio used sfumato to create a dreamlike effect in his fresco.
it is D. all of the above. if you listen to the song it is verry loud after a few second, the song is about 40 mins or so, if you look at the sheet music it is very complex.