Final answer:
False, Chiara Margarita Cozzolani, an Italian Benedictine nun and one of the most prominent female composers of her time, did not write the text of the Magnificat; she set the pre-existing biblical text to music.
Step-by-step explanation:
It is false that Cozzolani wrote the text of her Magnificat. Chiara Margarita Cozzolani was an Italian Benedictine nun and composer at the convent of Santa Radegonda in Milan. She was one of the most significant female composers of her time. However, the text of the Magnificat is a biblical canticle found in the Gospel of Luke (1:46-55), traditionally attributed to the Vir-gin Mary. It is not a text that was written by Cozzolani herself. Cozzolani set this pre-existing religious text to music, like many other composers of her era and later.