Answer:
B. Many countries have treated Jewish people poorly and forced them to leave.
Step-by-step explanation:
The most major start to the Jewish people forced to leave is known as the "Great Diaspora", which saw to the Roman destruction of the Jewish state of Israel and scattering them across the lands. This would continue all the way until after World War II (in which case you will remember the Holocaust, which saw to Nazi Germany murdering thousands of Jews as well as other deplorables) when the UN as well as the USSR recognized the state of Israel, creating a national country for all Jews, in which many started to move back to their historical lands.