How many symphonies did Beethoven compose during his middle period?

Which composition is a stunning example of a mensuration canon?

a. Salve, Regina b. Missa Prolationum c. Guillaume se va chaufer d. Prenez sur moi

Bernini's statue of David differs from his predecessors by showing David in what moment?

A. Waiting for the enemy B. After he had slain Goliath C. In later life as king D. In the heat of combat