Read this excerpt from "America's uneasy 'browning'" (2012) by Clarence Page:
 America is quietly "browning," it is said, like dinner rolls in a warm oven. Yet such change does not come about without resistance from those
 who prefer to remain unbaked.
 Which literary device did the author NOT use in this excerpt?
 O Imagery
 O Personification
 O Foreshadowing
 O Metaphor