Which of the Following Is True as to the Biological

Which of the following is true as to the biological basis of homosexuality?

A) There are size differences in several brain regions that correlate with sexual orientation.
B) The concordance rate for sexual orientation is low in male and in female identical twins.
C) Maternal stress during pregnancy decreases androgen production in male rats, causing decreased male and increased female sexual behaviors.
D) Testosterone has diminished activational effects in homosexual men compared to heterosexual men.
E) There is no solid data linking brain structure differences with sexual orientation.