Which adolescent ethnic minority tends to have the lowest self-esteem?

Frenchman René Clair made several musicals illustrating his theories of sound. Which one of the following was an element of his theories?

A. Clair believed that sound must be used indiscriminately. B. Clair believed the ear was not as selective as the eye. C. Clair believed dialogue must be synchronous. D. Clair believed sound can be edited in the same way as images.

Two melodic lines playing against each other are found in

a. a fugue.
b. a symphony.
c. ragtime.
d. an art song.