Answer:
D)the publication of the Emancipation Proclamation is the answer I'm not sure tho
The Fourteenth Amendment's equal protection clause was enacted to ensure that all people have the same right within the law regardless of where they came from or the color of their skin.
This later on lead to the principle, that Even Government officials will have to be subjected to law just as ordinary citizen do. Which lead to the creation of check and balance system
hope this helps
You need your book to answer the questions
B. The group of states including those in the Northeastern United States