Answer:
C. Protection against self-incrimination
Step-by-step explanation:
In the year 1966, in the famous Miranda v. Arizona case the supreme court ruled that the the detained criminal suspect must be informed of the constitutional rights to an attorney and self-incrimination, before the police questioning. The supreme court came to the decision that it could not take the confession of the suspect as an evidence as the police had failed to inform the suspect of his constitutional rights. The police duty to give this warning before the questioning is mandated by the fifth amendment which gives the criminal suspect the right to refuse “to be a witness against himself”.