What was the main reason that yellow journalism strongly affected American attitudes about Cuba and the Spanish-American War? Very few average Americans read newspapers, but most politicians did. People got most of their information about world events from newspapers. People trusted the information because the newspapers were careful to print only facts. Yellow journalism reports featured accurate information from reliable sources.

The correct phrase is People got most of their information about world events from newspapers. That being said the specific coverage about Cuba and the Spanish-American War was heavily exaggerated, although it did contain some facts, however the grand majority of those newspapers were only sold in New York City and the politicians barely read them. It exaggerated what Cuba was going through, but it did push the Americans to intervene with the island nation's problem under Spanish rule.