Answer:
The detail that best supports the answer is Option B: “As Prof. 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.” ( Paragraph 8)
Step-by-step explanation:
Part A says that when teenagers do not use internet, they develop social skills and become successful in future. So, the answer that supports this idea is that Prof. Robert Kraut told that such people who use less internet, they replace the low quality relationship of virtual reality with real relationships in real world.
Other Options are not correct. Option A says that teenagers that use internet are better. Option C and D mention about Marcus which is not correct.