The central personage of a play is called the _____

The center of which architectural structure is called a keystone?

a. Post-­??and-­??lintel b. Arch c. Bearing-­??wall d. Cantilever

Which of the following best describes the concept of "swing"?

a) Playing with the feeling of forward momentum b) Multiple rhythms occurring at the same time c) The sequential arrangement of stacks of notes that accompany melodies d) The density and quality of the instrumentation of a selection