The answer is actually option B "There was history of anti-Semitism in Europe." It isn't option D because Germans weren't jealous of their thriving businesses and it's a really bad reason to mass murder millions of Jews. It wouldn't be option C because some Jews did but they had different religions and ideas on the world. It wouldn't be option A because Jews did NOT support the soviet political ideals. It's option B because Jews did not agree with Semitism and it's basically the way Jews should be treated.
Hope this helps.
