Respuesta :
The purpose of File Extensions is that they tell the Operating system what kind of document you are creating.
What is File Extension?
A filename extension or file extension is a suffix added to the name of the computer file which indicates the characteristics of the file or its purpose.
What is Operating System?
Operating System is the initially loaded programme in the computer which manages all the running programmes, applications and functions of the computer. Some of Operating systems are Linux, Microsoft Windows, Mac OS etc.
What is a Document?
Any file which contains any kind of information is a Document. Document can be in any mode like Hard copy or in electronic form like pdfs, excel sheets etc.
Hence Option B is the Correct answer.
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