After how many minutes of watching video monitors does the attention of most people fall below acceptable levels?
A) 10
B) 20
C) 30
D) 40

Name: After how many minutes of watching video monitors does the attention of most people fall below acceptable levels? A) 10 B) 20 C) 30 D) 40
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Question

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U.S.government experts on security technology hold that after 20 minutes of watching video monitors the attention of most people falls below acceptable levels.

After How Many Minutes of Watching Video Monitors Does the Attention