Joshua is told by his teacher not to play with the scissors. Joshua then puts the scissors down. According to Piaget, Joshua is experiencing

During the Classical period, concerts generally began and ended with a work in this genre

A) concerto B) concert aria C) symphony D) concert overture

What was the most vexing question for symphony composers during the late nineteenth century?

a. Whether to write a programmatic or absolute work. b. What size of orchestra to use. c. Key relationships. d. Whether or not to make a break between movements.