21. Which of the following are prevention of computer-related injuries?
A. Make sure the screen is too close to your face.
B. Make sure your main source of light is not shining directly into your face or into the screen.
C. Mix your tasks to avoid long, interrupted stretches.
D. Type lightly and gently.
A. Make sure the screen is too close to your face.
B. Make sure your main source of light is not shining directly into your face or into the screen.
C. Mix your tasks to avoid long, interrupted stretches.
D. Type lightly and gently.
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Answer:
b
Explanation: