In a GAF roofing system warranty context, what is the significance of 'wind speed rating' on shingle products?
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A
It indicates the maximum installation temperature for the shingles
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B
It specifies the maximum sustained wind speed the shingle is warranted to resist when properly installed
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C
It measures the wind-driven rain resistance of the underlayment beneath the shingles
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D
It determines the required nail length for the application