Answer:
D). It develops a dramatic tone.
Step-by-step explanation:
The tone is elucidated as the author's approach or attitude towards a particular subject matter which is reflected through the choice of words or language adopted by the author. It offers a framework through which the audience can perceive the text.
In the given sentence from 'Why I write?', the phrase 'efface one's own personality' develops a dramatic tone as Orwell offers a reasonable claim that 'to create a considerable written work, one needs to be objective and factual' and eliminate his/her own opinions or thoughts while writing. His claim could be substantiated logically as the author must be impersonal as the inclusion of his/her opinion or personality may offer a biased representation. Thus, option D is the correct answer.