My choice would be A. It’s not B since “the conflict are” is incorrect. Not C since “they writes” is incorrect. And I believe D is incorrect since “a Nobel Prize winner” doesn’t agree with “are” — you could rewrite it as “The Nobel prize winner IS either Lessing or Gordimer”.
Answer:
are there choices????????/
The most helpful to the revising process of these would be the last one, proofreading before revising. This allows you to get all of the little errors out of the way before adjusting the big ideas or problems you may see in your writing. This allows you to focus on the main revision instead of the small details like misspellings, grammatical errors, and missed punctuation in your writing. While almost all of these would be helpful, the last option makes revision much less time consuming due more efficient.