Perfect fifth because you are going from do to so which is 5 steps apart :) so do to ti would be a perfect seventh since theyre seven steps apart. a perfect octave would be do to do.
Answer:
in the early 1850's, they ranged from 25 cents to 50 cents, so D
I believe it's either dissonance or intervals sorry if it's wrong
As many times as you want makes most sense to me but they all fit in the sentence
