To provide an accurate answer, I would need to see the passage in question. However, based on the options provided, if the content discusses the need for understanding and effectively navigating media, the best reflection of the author's purpose would likely be:
To explain the importance of media literacy in the digital age.
If the passage focuses more generally on misinformation and its effects, then:
To highlight the challenges of misinformation.
Please provide the passage or more context if you'd like a more specific analysis!