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.
Answer:
Most Southern European immigrants were motivated by economic opportunity in the United States, while Eastern Europeans (primarily Jews) fled religious persecution.
Explanation:
this was a problum because it caused over population and overcrouding and closed a whole lot of job closeing and finacial overload money culd not keep up with the population
