The composer of this work is?

In The Valkyrie, Wotan's spear is accompanied by

a. bright, constantly shifting music that darts around. b. a steady, confident, downward-striding figure in the brass. c. a descending line played softly by winds and high strings. d. a bright, confident fanfare.

Which type of microphone requires a battery, or some other form of power, to work?

A) dynamic B) condenser C) balanced D) unbalanced E) hypercardioid