I have no clue of "which of the following" because i cannot see the answers but,
The Great Migration, or the relocation of more than 6 million African Americans from the rural South to the cities of the North, Midwest and West from 1916 to 1970, had a huge impact on urban life in the United States. Driven from their homes by unsatisfactory economic opportunities and harsh segregationist laws, many blacks headed north, where they took advantage of the need for industrial workers that first arose during the First World War. As Chicago, New York and other cities saw their black populations expand exponentially, migrants were forced to deal with poor working conditions and competition for living space, as well as widespread racism and prejudice. During the Great Migration, African Americans began to build a new place for themselves in public life, actively confronting economic, political and social challenges and creating a new black urban culture that would exert enormous influence in the decades to come.
Answer:
it's world war11 and nuclear bombs
Abraham Lincoln and Stephen A. Douglas had their disagreement on: <span>whether slavery should be allowed to expand to new territories
According to Abraham Lincoln, all form of slavery should be abolished from every corner of United States while according to Douglas, slavery should be allowed on every states that agree to legalize it.</span>
The primary difference between these two wars was that in the French and Indian War the colonists (who weren't that concerned with territory) were fighting alongside the British, while during the Revolution they were fighting against the British.
I think it's Africa. google it