The correct answer to this open question is the following.
Based on the Judicial Branch the court case that stands out to me the most is Brown v. the Board of Education of Topeka, Kansas.
For me, this is one of the most important cases in the history of the United States.
The case was decided on May 17, 1954. The Supreme Court decided that state laws in the US public school system that kept racial segregation were unconstitutional.
This was a major advancement in the country regarding the shameful subject of racism. After the US Supreme Court decision, racial segregation in public schools of America ended, at least in theory and by judicial mandate.
D - Check and balances.
This is a basic fundamental system of the American government, as it prevents corruption within, as each branch has its own way to check on other branches and balance the powers as a whole, hence the term "checks and balances".
Delusional disorder, previously called paranoid disorder, is a type of serious mental illness — called a “psychosis”— in which a person cannot tell what is real from what is imagined. The main feature of this disorder is the presence of delusions, which are unshakable beliefs in something untrue.
It would be interest rate, as they charge you a percentage fee for borrowing their money. (Credit cards!)
