using all of their fingers, a skilled glass armonica musician can\na achieve a pleasing vibrato effect.\nb…

using all of their fingers, a skilled glass armonica musician can\na achieve a pleasing vibrato effect.\nb slow some bowls while playing others.\nc quickly adjust the volume of the notes.\nd play several notes at the same time.

using all of their fingers, a skilled glass armonica musician can\na achieve a pleasing vibrato effect.\nb slow some bowls while playing others.\nc quickly adjust the volume of the notes.\nd play several notes at the same time.

Answer

Brief Explanations:

A skilled glass armonica musician can use all their fingers to play multiple notes simultaneously. This is a key ability related to the instrument's playing technique. The other options are not the main result of using all fingers.

Answer:

D. play several notes at the same time.