Analyzing Author's Argument on Social Media Effects

In an editorial discussing the impact of social media on public discourse, the author argues that social media platforms create echo chambers that reinforce existing beliefs and stifle open dialogue. The article highlights several studies demonstrating how algorithms prioritize content that aligns with users' perspectives, thereby limiting exposure to differing viewpoints. The author concludes that this phenomenon has significant implications for democracy, as it may hinder informed decision-making among the populace.

Which of the following best describes the author's argument?