Final answer:
Yellow journalism's sensational and inflammatory reporting, led by figures like William Randolph Hearst, manipulated public opinion to support war with Spain.
Explanation:
Yellow journalism played a significant role in encouraging the United States to go to war with Spain by using sensational headlines that were inflammatory and lacked factual reporting. This technique, popularized by media magnates like William Randolph Hearst, aimed to stir up public emotion and manipulate public opinion through exaggerated or false stories. By arousing outrage and portraying Spain in a negative light, yellow journalism helped create a pro-war sentiment among the American public.
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