Economic problems for many countries in Europe in the 1920s and 1930s were mainly caused by "<span>B. World War I," since this war left many countries torn apart in terms of their economies. </span>
I believe A might be right
The plan was referred to as the final solution but Hitler's goal was extermination (A)
The Ottoman Empire didn't welcome the newcomers, but it was certainly a much better place for these Jews to live than Spain or Portugal. The Ottoman Empire didn't welcome the newcomers beause they had an opposing Muslim religion previously. I apologize this isn't the complete answer, as I do not know much on this topic
Heres links to help --
https://en.wikipedia.org/wiki/History_of_the_Jews_in_the_Ottoman_Empire
https://www.myjewishlearning.com/article/the-ottoman-empire/