Read the notice: 'Library books must be returned within two weeks. A fine of 10 cents per day applies to overdue items.' A student borrowed a book on March 1st. What happens if they return it on March 20th?
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A
They pay no fine because it is within the month.
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B
They pay 60 cents because the book is 6 days overdue.
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C
They pay 20 cents because they kept it 20 days.
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D
They pay nothing if they renew the book online.