What led to the birth of polyphonic music?
a)an increase in the size of church choirs
b)a need for dance music in the middle ages
c)the dominance of the church over the minds of people
d)an effort to revolutionize the plainchant

 I believe the answer is D.

True, all people no matter what deserve a fair trial.

Well, in my opinion, i would think that african art should be displayed at any museums as if it was any other type of american art because slaves were forced to this country, which resulted and different cultures, so it shows the diversity of our country. the challenges that may come about is if it is not displayed as honor or if they american portrayed the art as something worse