How Did the Findings of the Gatekeeper Studies Influence the Sociology

How did the findings of the Gatekeeper Studies influence the sociology of mass media's progress?

A) The Gatekeeper Studies revealed that certain individuals in control of mass media institutions dominated which cultural products were produced and which were ignored. This directed the sociology of mass media's attention toward a 'power elite.'
B) The Gatekeeper Studies emphasized that stories are produced (or not) for a variety of reasons, including personal bias, political factors, and organized production factors. As a result, the sociology of mass media began to consider mass media as cultural texts created by people in organizations with social constraints.
C) The Gatekeeper Studies considered factors that restrict minority access to mass media. In response, the sociology of mass media began to focus on the racialized and gendered elements of cultural production.
D) The Gatekeeper Studies did not influence the sociology of mass media's progress.
E) None of the above