In the United States, more than _____ of births occur via C-section

Which disorder would include intentionally taking drugs in order to stimulate various real illnesses?

a. Munchausen's syndrome b. malingering c. dissociative identity disorder d. somatization disorder

Family studies, twin studies, and adoption studies are primarily designed to

a. disentangle the effects of genetics and experience on behavioral traits. b. establish the groundwork for genetic engineering programs. c. demonstrate the empirical nature of psychological research. d. assess the effects of modern child-rearing methods.