The identity an author creates for himself in a story is known as his , This answer is stated in the analysis of the Mark Twain story "THE PRIVATE HISTORY OF A CAMPAIGN THAT FAILED
As per the question, the identity an author constitutes for himself in a story is acknowledged as his 'persona' as it is the voice having his/her perceptions or thoughts which reveals the ideas and thoughts of either the author himself or any other characters. It exemplifies a kind of disguise that the author adopts to present the ideas and story in the manner he wishes to convey it to the audience and offer an unbiased piece of work to them. Thus, <u>option D</u> is the correct answer.
