What refers to the distance between two sound frequencies or pitches?

a)tone
b)octave
c)interval
d) rhythm

answercouplet;

the music of the classical period was often written to be more accessible and enjoyable for all people, rather than just the wealthy. how does contemporary music reach all audiences instead of selected patrons? select a contemporary genre of music and discuss how it reaches varied audiences. be sure to identify your musical choice within your discussion.