During an Insanity Defense Trial,the Testimony of the Clinicians Hired

During an insanity defense trial,the testimony of the clinicians hired by the defense conflicts with the testimony of the clinicians hired by the prosecution.This suggests that:

A) scientific knowledge about abnormal behavior is incomplete and uncertain.
B) there is no basis for either of their testimonies.
C) the field has made great strides in its ability to predict abnormal behavior.
D) people really do have free will.