The Durham Rule Became Unworkable for Which of the Following

The Durham rule became unworkable for which of the following reasons?

A) Juries could not determine at what point "irresistible" impulses became irresistible.
B) A lack of precise definitions of such terms as "irresistible impulse" made it difficult for juries to interpret the law.
C) It proved difficult for juries to draw conclusions as to whether or not a person's "disease" had actually caused his or her criminal behavior.
D) It has forced jury selections to focus only on potential jurors who have had extensive coursework in psychology.