To be believable, a film story must, as Aristotle said, "have the capability of occurring in accordance with the laws of probability or necessity."

During the swing era, Louis Armstrong

a. continued to play Dixieland-style jazz b. briefly retired from jazz, becoming a popular singer c. became a soloist in Artie Shaw's big band d. fronted a number of his own big bands

In the Arena Chapel frescoes, Giotto deliberately abandons Byzantine symmetry to

a. conform the paintings to the shape of the chapel. b. make the scenes look more realistic. c. fit more figures into each scene. d. impart a greater sense of spirituality to the paintings