I believe what you're looking for is economics, but I could be wrong.
To your first question--James Madison is widely known as the architect of the US Constitution (Although in reality it was the result of team work by 56 delegates).
To your second question--The six key principles outlined in the US Constitution are:
1. Popular Sovereignty (i.e. democracy or rule by the people)
2. Limited Government (i.e. again, democracy or the government can only do what the people instructs it to do)
3. Separation of Powers (there are three branches of power: legislative, executive, and judicial AND they are separate from each other)
Which brings me to...
4. Checks and Balances (each branch "checks and balances" the other two branches' power. For ex: the US President can veto congressional bills, Congress can ratifies judicial nominees, and the Supreme Court decides on the constitutionality of congressional bills).
5. Judicial Reviews (the judicial branch reviews governmental actions)
6. Federalism (there is a federal and a state government. These are separate from each other)
Answer: Option D
Explanation:
A. As per the case Tyler has been going out to parties at his own will so it is not an outward conflict.
B. In the given case Tyler has no extra duties to perform so we cannot say he is suffering from overload.
C. As per the given case we cannot say he is having unhealthy food because no such statement in the given case evident that.
D. Tyler has been inconsistent as he always chooses party over practice, his behavior has been careless towards his goals.