Which of the Following Statements About Modern Research Undertaken on Sexual

Multiple Choice

Which of the following statements about modern research undertaken on sexual orientation Is true?

A) The concordance rate for sexual orientation (among siblings in which one identified as being homosexual) was found to be higher for identical twins than fraternal or adoptive, suggesting some genetic contribution for orientation.
B) There is some evidence that prenatal exposure to sex hormones can exert an influence on sexual orientation.
C) At present, we do not completely understand exactly what factors determine orientation.
D) There are likely factors related to both genetics and environment that influence orientation.
E) All of these responses are correct (i.e.true) .