Why did African-Americans have more difficulty purchasing a home than white Americans in the post World War II economic boom?

A) African-Americans had to pay a higher interest rate on federal loans.
Eliminate
B) African-Americans faced more racism in obtaining loans and moving into the suburbs.
C) Few African-Americans lived in the North and there was less construction in the South.
D) African-Americans were not allowed to serve in World War II and did not benefit from the G. I .Bill.

I'm pretty sure its B because they were mistreated because I don't think I remember hearing about D and they were also used as slaves back then but African American abolitionists couldn't handle slavery anymore but also people like Abarham Lincoln was trying to end slavery but let da South keep their slaves so dats why I think its B. I hope dis helps but if not just try searching it up :3

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.

the answer is "focused on"

lol gave an answer 1 week that's the answer for those who need it in the future xd