Answer:
d. Refusing to testify to prevent self-incrimination.
Explanation:
Under the United States Constitution, the "Fifth Amendment" is the right of everyone, more specifically a defendant, to remain silent when questioned so as not to provide any information that can be used to incriminate him/her in the trial. It guarantees the individual of every right not to answer any questions, and maintain his silence.
So, pleading the Fifth means refusing to provide any answers to the questions asked so that he will not provide any information that can be used against him/her. This amendment is also the very basis of the "Miranda Rights" of the American Constitution. And lastly, this right can only be invoked in any legal process.
