Name the row of buttons on the switcher used to select the video sources for a specific effect

The convention of hieratic scale can be seen in

a.the Royal Standard of Ur. b. Head of an Akkadian Man. c. Human-Headed Winged Bull. d. the Achaemenid rhyton.

Which opera composed by Giuseppe Verdi demonstrated his belief that opera should be dramatically realistic?

A. Tannhäuser B. Tristan und Isolde C. The Ring of the Nibelung D. Rigoletto