Studies into Biological Mechanisms Underlying Sexual Orientation Suggest That

Studies into biological mechanisms underlying sexual orientation suggest that

A) sexual orientation develops the same way in gay men as in lesbians.
B) sexual orientation develops the same way in heterosexual men as in lesbians.
C) the mechanisms governing sexual orientation are more variable and complex in women than in men.
D) in most lesbian women a fragment of the Y chromosome "jumped onto" one of her X chromosomes.
E) adult lesbian women have lower levels of testosterone than heterosexual women.