I believe it grandfathers act and then the literacy test
I think it’s having to do social customs or habitual or customary usage
Explanation:
The system of checks and balances in government was developed to ensure that no one branch of government would become too powerful. The framers of the U.S. Constitution built a system that divides power between the three branches of the U.S. government—legislative, executive and judicial—and includes various limits and controls on the powers of each branch.
C I think cause teen pregnanty is not really important then the other answers a brainliest will help :)