When Considering Genes as a Potential Source of Sexual Orientation

When considering genes as a potential source of sexual orientation:

A) the connections between genes and behavioral traits have been scientifically established.
B) genes can produce the effect of attraction to one gender or the other and to express it.
C) genetic inheritance typically occurs in one direction of development in most species.
D) genes create speech centers in the brain and dictate parental love,and the cultural environment that help in expressing sexual attraction.
E) it is assumed that if genes or DNA causes sexual orientation,then the orientation is not present at birth.