Which of the following describes the distinguishes music of the classical era?

a) terraced dynamics
b) tonic-dominant harmony
c) basso continuo
d) constant change in mood

frederick the great, king of prussia was a general

the answer is b. i'm positive it's that answer.

i think it's about 10 mins.

actually i think that's wrong, but i don't know how to delete this.

but who knows it might be right.