What drawback hindered the success of the daguerreotype?

To what world historical event does Boccaccio allude in the following line from his Decameron: “Gathering in those houses where no one had been ill and living was more comfortable, they shut themselves in.”

a. the Black Death b. the Hundred Years War c. the Great Schism d. the fall of Rome

Andrzej Wajda's trilogy of films about the non-Communist Polish underground was characterized by:

A. an ironic, demystifying attitude. B. an unfashionable commitment to Socialist Realist technique. C. a romantic celebration of doomed heroes. D. a de-dramatized vision of combat.