"<span>B) They felt they both had had similar experiences with prejudice" would be the best option from the list, since the Jews had been persecuted heavily in the United States, but not to the same extent as African Americans.</span>
It was a chain reaction. Long story short, the countries were pulled into the war because of agreements they had with their allies. This treaty is what caused the countries to enter WWI, to protect and defend their allied countries who were already in the war.
D. Critics were horrified to learn that the government expected an eventual Communist victory.
Hope this helped!