This answer sounds like a trick question, but the most logical answer is C.
A is wrong since banks were not allowed to refuse loans due to the GI Bill home loans; however, the African Americans were usually refused the option of getting the house which helped them qualify. It was really hard for them to find programs that let them get those home loans.
B. The preamble,The Preamble to the
Constitution mainly serves as an introductory statement that outlines
the reasons the U.S. Constitution was written and the values it
represents.
