The fact that humans have a unique genetic capacity to learn language is best associated with the concept of

Research on social factors and the risk of posttraumatic stress disorder suggests a role of social support in the etiology of posttraumatic stress disorder (PTSD). It was found that veterans

a. who didn't face the embarrassment of being treated as heroes had lower rates of PTSD. b. from units that encouraged independence had lower rates of PTSD. c. who did not receive social support on their return had high rates of PTSD. d. who had high social support through the Veterans Administration still had high rates of PTSD.

Research on social factors and the risk for PTSD focuses primarily on the nature of the trauma, the individual's level of exposure to it, and __________________

a. genes b. unconscious disassociation c. levels of cortisol d. the availability of social support following the trauma