Which of the following elements is absent from the style of Return to Forever?

Christoph Willibald Gluck attempted to reform opera by

a. having all the aspects in the opera be integral to the drama b. increasing the role of the orchestra c. avoiding the use of mythological characters in his operas d. making greater use of the chorus e. making his operas longer

The long gray shape in Holbein's The French Ambassadors that becomes a skull when viewed from a specific angle is called _____

a. vanitas painting b. a memento mori c. an anamorphic image d. a genre