What Was the Major Change in the Insanity Defense Contained

What was the major change in the insanity defense contained in the Defense Reform Act?

A) The defense was required to prove insanity on the part of the defendant.
B) The prosecution was now required to proved the defendant was not insane.
C) The court took on the task of proving whether a mental illness existed or not.
D) A new, more stringent, standard was imposed on the defense task of proving the defendant was insane.