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C is corrent. Computer software now is generally recognized as being copyrightable. Also, as in general copyright law, the fair use doctrine allows the user a defense to some allegations of copyright infringement.
A is incorrect. Computer software now is generally recognized as being copyrightable. Also, as in general copyright law, the fair use doctrine allows the user a defense to some allegations of copyright infringement. 
A is incorrect. Computer software now is generally recognized as being copyrightable. Also, as in general copyright law, the fair use doctrine allows the user a defense to some allegations of copyright infringement. 
D is incorrect. Computer software now is generally recognized as being copyrightable. Also, as in general copyright law, the fair use doctrine allows the user a defense to some allegations of copyright infringement.