Answer:
The correct answers are
a) Imitative polyphony
b) Often printed
c) Religious in nature
Step-by-step explanation:
The Renaissance period completely changed the way music was produced and listened to across Europe. While humanist ideals placed a huge role in developing secular music, religion stayed a core part of all art forms including music.
However, with the invention of the printing press in 1439, printable music was possible and distributed throughout the continent.
This also provided the basis for experimental music and polyphony became a major incorporation into not only Gregorian chants but also other forms of music.