According to Chapter 11, Which of the Following Has Not

According to Chapter 11, which of the following has not been stated as a concern regarding testimony by psychological or psychiatric experts?

A) The scientific foundations for a lot of the testimony offered in court are often less than adequate.
B) Much of the testimony is of limited relevance.
C) Experts do not get enough opportunities to testify about "ultimate issues" such as whether the defendant is insane.
D) Expert testimony is very expensive so the side with the most money has an advantage.