________, a new literary genre, provided penetrating commentary on current events and social behavior, as popularized in the newspapers and periodicals of the day.

Ambrogio Lorenzetti's Allegory of Peace (fig. 5.8) is a fresco that was painted directly onto __________

A. unsized canvas B. wet plaster walls C. panel treated with glue D. paper that has been left in the sun to dry completely

__________ is characterized by vertical steel supports and horizontal slabs of reinforced concrete that are connected by stairways

Fill in the blank(s) with correct word