An employee in a newly designed office reports persistent eye strain and headaches. The workstation is equipped with a new adjustable chair and desk, and the computer screen is positioned an arm's length away. Which environmental factor should the facility manager investigate FIRST as the most likely cause?
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A
Inadequate ventilation rates.
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B
High ambient noise levels from the open-plan layout.
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C
Improper desk-to-chair height ratio.
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D
Glare from overhead lighting or windows on the computer screen.