The power of the State
Explanation:
The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people.
The opinions that are being collected and are being published in volumes of books is known as reporters, which is letter A. It is because this is what the court judges made use of in writing their opinions in regards of their decision in a particular appeal or trial.
A primary election. This is so the voter can choose a candidate from a political party, then to nominate them as the party's candidate
I believe it's either psychoanalytic theory or trait theory :)