Research on Sex-Reassignment Surgery in Gender Identity Disorder (GId) Has

Research on sex-reassignment surgery in gender identity disorder (GId) has found that:

A) There is generally an extended period of post-operative regret
B) Male to female transsexuals have greater success than female to male transsexuals
C) Success depends on emotional stability, among other preoperative factors
D) Psychotherapy does not provide additional benefits to the patients above and beyond the surgery itself