Jamie is considering letting his infant son, Darwin, undergo a male-to-female sex-change operation. Darwin was born a male, but with a malformed penis. Jamie's psychologist advised him to raise Darwin as a girl, but Jamie was convinced that Darwin would experience gender dysphoria as he grew older since Darwin is genetically male. On the other hand, Jamie's wife, Erika, believed they should delay the surgery until Darwin was older and let him make the choice. Which of the following, if true, would strengthen Jamie's argument? 

a) The effects of sex assignment surgery on adult sexual function and gender identity can only be evaluated several years after surgery. 

b) According to Dr. Sullivan, a psychologist, all infants are psychosexually biased at birth and conform to a gender identity via the process of socialization. 

c) Research suggests that individuals who have been raised in their genetic sex show a more stable gender identity than those who have not. 

d) Studies reveal that the percentage of individuals born with ambiguous genitalia who conform to the gender identities of their assigned sexes is larger than the percentage of individuals who do not.