According to the agenda-setting theory,which of the following serves as the main gatekeeper of information?

A) corporations
B) media
C) early adopters
D) government

According to the agenda-setting theory, media serves as the main gatekeeper of information because they have the ability to select and prioritize the news stories that are reported to the public, thereby shaping the public's perception of what issues are important. While corporations, government, and early adopters may have some influence on the media's coverage, the media ultimately controls the dissemination of information to the public.