Which choice most logically completes the text? | Verbal SAT Question

In 2013, Shirley Ann Williams et al. performed a meta-analysis (an assessment of previous research) of studies of the social media website formerly known as Twitter, such as the 2011 paper by Brody and Diakopoulos titled “Cooooooooooooooollllllllllllll!!!!!!!!!!!!!! Using Word Lengthening to Detect Sentiment in Microblogs,” in order to identify research trends. Williams’s team found that while a significant number of papers focused on profiles of users, many focused on message content. Williams’s team also found that when researchers focused on message content, they were especially likely to use knowledge discovery methods (methods derived from statistical analysis and artificial intelligence that are aimed at handling enormous amounts of information), suggesting that

Which choice most logically completes the text?

researchers tended to expect the amount of information in social media messages to be particularly high.

studies using knowledge discovery methods are more widely cited than studies that do not use such methods.

researchers typically presumed that a small proportion of users account for most of the information in social media messages.

knowledge discovery methods yield less reliable results when applied to user profiles than to the content of social media messages.