None of the options provided is correct as to how you format a valid date serial number as a date.
What do you mean by format?
A blank diskette, hard drive, or other drives can be made data-ready with the format command. All data would be deleted from the disk or drive if it previously contained data. For instance, typing "format C:" would completely erase everything on your computer's hard drive, including the operating system (e.g., Windows).
A document's or a spreadsheet's general layout is frequently referred to as its format or document format. As an illustration, the alignment of text in many English papers is to the left of the page. A user could modify the text's format to bold to emphasize certain words.
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