The correct answer among the options provided would be the Three-Fifths Compromise.
The Three-Fifths Compromise was a constitutional agreement reached during the Constitutional Convention of 1787, which determined that each slave would be counted as three-fifths of a person for the purpose of representation in Congress and taxation. This compromise effectively institutionalized a form of racial inequality by recognizing enslaved individuals for representation while simultaneously denying them rights as full human beings.
While "coverture" is also a legal doctrine that created inequality between men and women, the Three-Fifths Compromise is explicitly enshrined in the Constitution itself.
"Plessy v. Ferguson" is a Supreme Court case rather than a constitutional provision, and "redlining" is a modern practice related to housing policies and not directly contained in the Constitution.