For question 2, the word that best describes the beliefs teens have about their peers because of social media is:
B. unrealistic
For question 3, the piece of evidence from the text that best supports the answer to question 2 is:
D. "Students' use of social media 'may form distorted perceptions of their peers,' Nesi says." (Paragraph 9)
This evidence aligns with the idea that social media can lead to unrealistic perceptions among teens regarding their peers.