Who wrote Ephesians?

Who wrote the Summa Theologica and was one of the prominent spokesmen for Scholasticism?

a. Magnus b. Trotula c. Abelard d. Aquinas

Which statement is true of these three excerpts?

a. Each has a lower pitch level than the preceding excerpt. b. Each is softer than the preceding excerpt. c. Each has half as many notes as the preceding excerpt. d. Each has twice the number of notes as the preceding excerpt.