According to the passage, the original proponents of the Fourteenth Amendment were primarily concerned with A. detailing the rights afforded by the principle of equal citizenship B. providing support in the Constitution for equal protection for all citizens of the United States C. closing a loophole that could be used to deny individuals the right to sue for enforcement of their civil rights D. asserting that the civil rights protect by the Constitution included nonracial discrimination as well as racial discrimination E. granting state government broader discretion in interpreting the Civil Rights Act in 1866