Which two chant traditions were the principal sources for what has come to be known as Gregorian chant?

The first country music hits were recorded by this artist:

a. Jimmie Rodgers b. Vernon Dalhart c. A.P. Carter d. Al Jolson

Which of the following was not a major theme Bruno Louchouarn developed for the Eurydice score?

A. Orpheus seeking revenge for the loss of his Eurydice B. The development of the Lord of the Underworld from a grotesque child to a threatening figure C. Orpheus as a musician composing a gift of music for Eurydice D. The downward movement of all characters from the world