The answer could be A or B because the date of the webpage could be outdated and the author of the page could be unreliable. I personally would say A.
Because of their race and background
I would say the 1st one is the only one correct. The 2nd one should be who, the 3rd one should more and likely be whom, and the last one should probably be who. I don't know if I'm 100% though. I hope I helped.
Answer:
i dont know, i wish i could help
Explanation: