Final answer:
The Catholic church did not support the performances of nuns in public and their use of polyphony.
Step-by-step explanation:
False
The statement that the Catholic church supported the performances of nuns in public and their use of polyphony is false. Polyphony is a form of music that involves multiple voices or instruments playing different melodic lines simultaneously. While polyphonic music did become popular during the Renaissance, the Catholic Church did not support nuns performing in public or the use of polyphony by nuns.