Answer:
A
Explanation:
They depended on optical illusions because they weren't able to generate the things we can (they didn't have computers and such)
<span>The branch of musicology that studies music from an anthropological perspective is known as Ethnomusicology. This field of study is concerned with the cultural aspect of the musicians. Ethnomusicology dates back to the 1950's era in a generalized sense for the field.</span>
