Answer:
The Notre Dame school trained a lot of famous singers in the Middle Ages. They were the first group of composers to bring Polyphony into the church. They cataloged a significant amount of music do that is why we know so much about music from the Middle Ages today.
I think the correct answer from the choices listed above is the third option. The composer who is known for alternating music between two groups of voices or instruments would be Lorenzo de Medici. Hope this answers the question. Have a nice day.
The answer to this question is Rubato.
Answer:
the state of being a friend; association as friends:
Explanation: