GMAT Critical Reasoning (CR) | Re: The kinds of hand and wrist injuries that result from extended

E is wrong, because the question does not talk about the Number / Percentage of students who get hand / wrist injuries by computer usage, but talks about injuries caused in general.
But the teachers' idea of reducing the injuries by monitoring in classroom might fail, it the students spend substantial time out of classroom using the computer. In that time outside of school, they may be prone to injuries because
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