Select all of the factors that enabled racism to become institutionalized in the United States following the end of the Reconstruction period. Question 12 options:

The federal government banned the application of grandfather clauses to new laws.

Federal troops were removed from southern states.

Southern state governments repealed laws that limited African-Americans' ability to vote.

The Supreme Court affirmed the principle of "separate but equal" in Plessy v. Ferguson.

The Republican Party regained control of state governments in the South.