I think your answer would be B because think about it. In the USA and how thousand and thousands of people dying everyday and the same thing with upcoming nations
Answer:
Two hundred years ago this month, the United States abolished the trans-Atlantic slave trade. Eric Foner, a historian at Columbia University, takes listeners inside the historical moment tied to one of America's darkest eras.
Explanation:
The Black Death killed a vast number of people in Europe.
As such, workers were in high demand, giving serfs more power to negotiate and more freedom to move about to find the best deal. Many former serfs moved to cities.
However, the Black Death also caused the nobility to lose a lot of money - no workers, no food or goods.
The answer to your question is, I believe, B.
Reserved powers are set aside for the states or for the people.
One reason that more people didn’t foresee the economic collapse of the 1930s is that it came about so suddenly, with practically no warning, since the US economy throughout the 20s was thriving and "booming"--leading people to think that there were no issues whatsoever.