She made Nya's part as the most the people in South Sudan as one.
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”.
The first two seem the most logical.
Some people may say Uniforms make the school look better