What technique would a soloist use to signal an end to the cadenza, and to cue the conductor to bring the orchestra back in?

The aerophone playing on the recording is the

A. nay B. buzuq C. qanun D. ‘ud

In America, ________, champion of the abolitionist movement, serves today as a prime example of Promethean defiance of authority and defense of human liberty.

A. Dubois B. Douglass C. Gandhi D. Garvey