Answer:
Immigrants ramp up the competition for jobs, creating a surplus in labor for some sectors. Also promoting innovation.
Explanation:
B is correct.
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Answer:
The diversion of the Fourth Crusade from the Holy Land to attack, capture, and pillage the Byzantine city of Constantinople divided and dissipated the efforts of the Christians to maintain the war against the Muslims. It is widely regarded as a shocking betrayal of principles out of greed.
Explanation: