D. To convince teenagers to stop playing video games.
Explanation:
The format, structure, and writing syntax of the paragraph implies that the paragraph is an argumentative passage. The author even states, "Go outside!" which eliminates answer choices C, because the author does not advocate for teenagers to play more educational games. Answer choices A and B are not supported because there is insufficient evidence to support the statements being made in those answer choices. In addition, both answer choices A and B do not represent a goal of an argumentative passage. Therefore, the answer is D. To convince teenagers to stop playing video games.