How did robber barons create monopolies in the United States during the late 1800s? A. By shortening the workweek B. By paying higher wages C. By improving working conditions D. By buying up competitors
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Robber barons created monopolies in the United States during the late 1800s primarily by D. By buying up competitors. They engaged in practices such as mergers, acquisitions and predatory pricing to eliminate competition, consolidate their control over industries and establish monopolistic dominance.