SAT English Practice Question

The author’s central argument in the passage is that while the practice of using social media for social purposes can be beneficial, it can also have a negative impact. However, the author argues that this negative impact can be minimized by following a few simple rules. The author concludes that it’s important to be mindful of the time spent on social media, and to avoid using it for purposes that are not conducive to a positive social experience. What is the main function of the underlined portion?

1. A.provide a summary of the author's argument.
2. B.explain the author's reasoning.
3. C.identify a specific problem the author is addressing.
4. D.highlight a solution to a problem the author is addressing.