The answer is D. the availability of complementary goods
Answer:
providing good economy for it's citizens
The baby boom is also called Post-World War II baby boom, and this already reveals the cause: after the war the economy was raising again, after hard times, and people were optimistic about the future
I think the correct answer would be that when <span>people feel the need to escape,they may move to another area. When people are persecuted, they definitely would feel danger in their lives and to protect the lives they would tend to migrate to other place where they are safer.</span>
