A property-carrying driver starts their on-duty period at 6:00 AM. They drive for 4 hours, take a 2-hour off-duty lunch break, and then resume driving. According to the 14-hour 'driving window' rule, what is the latest time they can legally drive a commercial motor vehicle?
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A
10:00 PM
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B
8:00 PM
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C
9:00 PM
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D
12:00 AM