What is music?

A) The speed at which the beat is played.

B) The art of arranging sounds and silence in time

C) A system based on major and minor keys

D) the simultaneous sounding of three or more pitches

B. The art of arranging sounds and silence in time

Explanation:

Music is the combination of melodies, rhythms, and combination of sound instruments.

It is an art of arranging tones and sounds in agreement with time. It involves both voice and musical instrument sounds such as guitar, piano, drums, trumpet, violine, etc.

Music is used to expressones current state of mind such as joy, happiness, sorrow, love war, etc

the answer is   as follows

d

c

b

a

d