________, in his autobiography Travels, protested the trade in African slaves that persisted throughout the eighteenth century.

Conceptions of music are closely tied to conceptions of ________.

Fill in the blank(s) with the appropriate word(s).

What is Pierrot Lunaire?

A. An atonal composition that does not use serialism B. An impressionistic work C. A tonal, romantically inspired composition D. A serial composition