The correct answers should be C, B, and B. I hope these are correct for you. In paragraph 3 it says " 100 years later the Negro live on a lonely island". this means the answer is C for the first one. The second one is B because when he says chains of discrimination he does not mean their actually held by chains. This means B is the answer for the second one. In paragraph 8 it says that "The Negro lives on a lonely island of poverty". This means B is the correct answer for the third one. Hope this helped.
All would seem appropriate, but I'd say D, since it assists you in gathering data to support your clause
The second choice romeo and Juliet secretly gets married with the help of nurse and frair laurence