I think the answer is c but i wound us my answer only because i’m trying to get points
During the medieval times, the Greek and Roman cultures were revisited resulting in the Renaissance period. Aristotle was a famous figure of the Greco-Romano world which was the reason why medieval philosophers looked into his ideas. Aristotle's ideas were centered on "The One" and pursuing the meaning of Aesthetics which were the focus of Aquinas' ideas.
The sentence implies a mood of stillness, or relaxation.