Which doctrine mandated media broadcasters to present diverse perspectives on controversial issues and was repealed in 1987?

The Fairness Doctrine was a policy that required broadcasters to present contrasting viewpoints on controversial issues of public importance. Established by the Federal Communications Commission (FCC) in 1949, this doctrine aimed to ensure that audiences were exposed to multiple perspectives, particularly on contentious topics, fostering a more informed society. By mandating that broadcasters provide airtime for differing opinions, it worked to minimize censorship and dominance of a single viewpoint in the media landscape.

Repealed in 1987, the Fairness Doctrine's elimination marked a significant shift in media regulations, leading to the increase in opinion-oriented programming and a greater prevalence of partisanship in broadcasting.

The other options do not center around the requirement to present diverse viewpoints on controversial issues. The Communications Decency Act focuses on regulating online content, the Equal Time Rule pertains specifically to political candidates in broadcasting, and the Media Bias Rule is not an established regulation. Hence, the Fairness Doctrine is distinctly recognized for its role and the impact of its repeal on media practices.