Answer:
B. Fleeing war and seek economics opportunities
Explanation: The answer cannot be A, as they are not seeking religious persecution, in some of these areas they are. It cannot be C as the Middle East and North Africa are some of the warmest climates of the world. Which leaves us with B and D. It is B as many countries such as Syria have many refugees leaving, and they are currently in a civil war, with Europe having more economic opportunities.