Most commentators on Baroque painting consider Caravaggio an early practitioner of that style, believing that his realism and novel use of the interplay of light and shadow broke sharply with current styles of Caravaggio' s time and significantly influenced seventeenth-century Baroque painting. One must ttherefore either abandon the opinion of this majority of commentators or reject Mather' s definition of Baroque painting, which says that for any painting to be considered Baroque, it must display opulence, heroic sweep, and extravagance. The conclusion of the argument can be properly drawn if which one of the following is assumed? ["Opulence, heroic sweep, and extravagance are not present in Caravaggio's paintings.", 'A painter who makes use of the interplay of light and shadow need not for that reason be considered a nonrealistic painter.', 'A realistic painting usually does not depict the world as opulent, heroic, or extravagant.', 'Realism was not widely used by painters prior to the seventeenth century.']