According to ASME B30.5, which signal must be obeyed by the crane operator regardless of who gives it?
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A
The 'hoist' signal, since raising loads is the primary crane function
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B
The 'stop' signal, which must be obeyed immediately by the crane operator no matter who gives it
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C
Only signals given by the designated signal person are required to be obeyed
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D
The 'lower' signal, to prevent dropped loads in emergency situations