When is the election winner declared?

we somewhat already know that Biden is the winner but they do some recounts is close states. either way Biden is the president elect and won't be officially president till the inauguration

your answer would be (a)

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.