Which shows how supreme court rulings have modified the fifth amendment?

Officers must inform people of their rights before questioning them in custody.

Explanation: The U.S fifth amendment is a very important part of the Bill of Rights since it protects people against self-incrimination. In order to do so, officers must let the person, who is being charged with a crime, know what his/her rights are. Only after that, they can interrogate him/her.  

To answer the question above as to which shows how supreme court rulings have modified the fifth amendment of the constitution, The fifth amendment is part of the bill of rights that "protects a person from being compelled to be a witness against himself" in a criminal case. 

The answer for this question is C 
I'm native speaker.