12 What is an orchestra?
OA
composers and musicians
ов.
dancers and singers
OC. performers playing various instruments together
OD
chamber orchestra

C

Explanation:

An orchestra is defined as a group of instrumentalists, especially one combining string, woodwind, brass, and percussion sections and playing classical music.

Not A, because composers are not playing instruments.

Not B, dancers and singers aren't playing instruments.

Not D, chamber orchestra is an example - a type of orchestra, but doesn't answer the question of what is an orchestra.

answer; opinion;