What Do Follow-Up Analyses on an Unusual Study of Two

What do follow-up analyses on an unusual study of two identical twin boys, one of whom experienced a circumcision accident, was subsequently raised as a female, and received appropriate sex-change surgery, reveal?

A) That socialization plays an even greater role in gender-identity formation than was originally assumed
B) That some intersexed children may not be as gender-malleable at birth as originally believed
C) Clear evidence that gender identity is psychologically neutral at birth
D) The efficacy of sex reassignment of children