The years 1915-1940 saw the great african-american migration, when millions of african-americans migrated from the south to the north. how did world war i foster this massive migration?

While the army was at war, many jobs opened up that otherwise would not have. The Army took up many workers, and the arms industry expanded.

The south, in the meantime, was stagnating. Traditional employment in the south was working to capacity and the north looked like worthwhile greener pastures.

ummm? is that supposed to be a question or a but this is a reason he won re-election

explanation:

"despite progress in the war, lincoln and most political pundits were convinced that he would lose his bid for reelection in 1864. the country was war weary and the democratic party's nominee, george mcclellan, was likely to negotiate a peace treaty with the confederacy if elected." - loc.gov

the answer is a. mothma gupta.