3. Part A: The author's main claim in the text is:
Teenagers who socialize primarily online eventually become incapable of forging healthy and lasting relationships with people offline.
4. Part B: The detail from the text that best supports the answer to Part A is:
"As Prog. Robert Kraut, a Carnegie Mellon researcher, told me recently, such people allowed low quality relationships developed in virtual reality to replace higher-quality relationships in the real world" P8.
5. Part A: The author's personal story shared in the introduction contributes to his argument by:
It emphasizes why the Internet is a dangerous resource for teenagers.
6. Part B: The detail from the text that best supports the answer to Part A is:
"Faced with the same challenge today, however, I would probably pass on meeting the girl's father—and outflank him on the Internet." P3.