You can eliminate some of these choices that don't make sense. Substitute each choice in the sentence in place of censure. Does it make sense to want to avoid encouragemnet? To avoid compliance? To avoid condemnation? To avoid apprehension?
I would go with condemnation.
This passage suggests that Inglis, despite her goals for change, is afraid, and realizes the challenge of her situation.
She wants to not only change Apartheid, but change the heart and perspective of the guard at her sister's jail, though she knows fully-well that this is going to be a difficult task. She also fears what will happen if she is unable to soften him.
The answer is A because the faults with the others is B - nobodys is supposed to be nobodies, C - girls' is meant to be girl's, and D - their equals they're.
