The Text Refers to a Study by Pietrzak, Goldstein, Southwick

The text refers to a study by Pietrzak, Goldstein, Southwick & Grant (2011) that asked participants with and without posttraumatic stress disorder (PTSD) to identify the "worst trauma they had ever experienced." Based on this study, who is most likely to have had posttraumatic stress disorder?

A) Nathan, who watched many hours of television coverage of the September 11, 2001, attacks on the World Trade Center
B) Ashley, who helped care for her mother during her final stages of cancer ​
C) Luis, whose brother was killed in a sudden car accident
D) Jessica, who was sexually assaulted in a parking garage at night