A driver wears a hearing aid and can perceive a forced whispered voice at 8 feet with the aid. Without the aid, she cannot hear at 5 feet. What restriction applies?
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A
No restriction; hearing aids are not regulated by FMCSA
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B
Must wear hearing aid while driving
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C
Disqualified; the driver must meet the standard without aids
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D
Exempt if driving intrastate routes only