I believe it's A.
The Muslims did control Jerusalem for a time, and I believe that they forced the Christians out of it.
Also the Crusaders did sack Constantinople when they were not allowed in by the government there.
I don't know what D is but I'll assume that it is true because I think A is false.
It was the fact that they bought up multiple productions
Answer: Their are a bunch of people who has helped saved the Jews, but the 2 main were Raoul Wallenburg and Dimitar Peshev.
Explanation: Hope my answer has helped you! :)
Answer:
B. to keep invaders out
Explanation:
The wall was built to help keep out northern invaders like the Mongols. Smaller walls had been built over the years, but the first Emperor of China, Qin Shi Huang, decided that he wanted a single giant wall to protect his northern borders.