During world war ii, many blacks migrated from the south to industrial cities in the north. why did they do this? (choose more than one)

-better job opportunities
-too crowded in the south
-fewer issues with segregation
-better public education

The correct answers are

- better job opportunities- The increased demand for wartime supplies (like guns, ammunition, tanks, etc.) resulted in an increased need for unskilled laborers in factories. Considering that millions of men were drafted into the army, more of these jobs opened up in the North for African American citizens to take over.

- Fewer issues with segregation- Even though racism still existed in the North, it was not nearly as bad as the Jim Crow laws of the law and the constant threats of violence faced by African American citizens in states like Alabama and Mississippi.

b is the answer i am assuming

it proved indian land claims were unjustified.