Music appreciation twentieth century internationalismthe individual rhythms of polyrhythmic music are                a.  played only once.      b.  identical.      c.  independent and contrasting.      d.  created by chance.

The individual rhythms of polyrhythmic music are independent and contrasting (option C) This term can be defined as " the simultaneous use of two or more rhythms which are not perceived as deriving from one another." It might be based on one entire piece or a momentary disruption. 

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