According to OSHA, which of the following is NOT an acceptable method to protect employees from electrical shock when working near overhead power lines?
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A
Relying solely on verbal warnings from a spotter without any physical barriers
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B
De-energizing and visibly grounding the lines
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C
Maintaining the minimum approach distance of 10 feet for lines up to 50 kV
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D
Erecting insulating barriers between the worker and the lines