Lines 3-4 ("Certain . . . Net") "Nicholas Carr: The Web Shatters Focus, Rewires Brains.” provides the best evidence.
Lines 3-4 "Nicholas Carr: The Web Shatters Focus, Rewires Brains" explains:
Therefore Option (A) is the correct Answer.
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The previous question is:
The author of Passage 1 indicates which of the following about the use of screen-based technologies?
A) It should be thoroughly studied.
B) It makes the brain increasingly rigid.
C) It has some positive effects.
D) It should be widely encouraged.
The correct answer is option (C).