Which of the Following Statements Represent(s) Congress's Position on the Use

Which of the following statements represent(s) Congress's position on the use of experts in cases of legal insanity?

A) Congress prohibited experts from testifying on whether the defendant possessed the mental state or condition that constituted an element of the crime.
B) Congress took the position that whether the defendant possessed the mental state or condition that constituted an element of the crime was a matter for the jury to decide.
C) Both a and b are correct.
D) Neither a nor b are correct.