Music appreciation the classical era composers wrote concertos for a. professional musicians who commissioned them. b. their students. c. all of the above. d. themselves to play.

The best answer is that concertos (which are large bodies of compositional work) were written for professional musicians who commissioned them. So the answer is A. Concerto's are large pieces of work often involving a solo instrument and full orchestra backup.

The dimensions of the drawing and persective

The right answer for this one is a