Social media websites rely on user engagement. Increasing the number of users and those users' activity means more advertising revenue. Most social media websites offer the service at no cost in order to attract more users, relying exclusively on advertising revenue to make a profit. The most popular articles shared on social media websites involve sensationalized stories of dubious value, including misleading titles and incorrect factual information. However, many users will stop using a social media website when the sensational stories become too overwhelming. As a result, social media companies would be best served by. . . Which one of the following best completes the argument? ['lying to advertisers about their user engagement.', 'surveying their users to determine what type of content they most prefer.', 'monitoring the ratio of sensationalized and factual articles.', 'prohibiting sensationalized articles.']