There Are Several Important Reasons Why the Defendant Should Be

There are several important reasons why the defendant should be able to understand what is happening at every stage in the criminal justice process. Which of the following is NOT such a reason?

A) If the defendant helps with his defense, it increases the likelihood of a just verdict.
B) The defendant can help his lawyer to find important witnesses to testify at trial.
C) It is easier for the prosecutor to convict the defendant who lacks the mental capacity to understand the basics of a legal proceeding.
D) Using the power of the criminal justice system against somebody who does not understand what is going on seems unfair.