Taryn, who was assaulted in a parking lot, experiences frequent nightmares and has withdrawn from her family and friends. since the attack, she has difficulty sleeping and can no longer hold down a job. taryn's symptoms indicate that she has:

Post-traumatic stress disorder (PTSD)

Explanation:

Post-traumatic stress disorder (PTSD) is a mental disorder in which an individual experiences dreams, flashbacks and nightmares about any terrifying situation that he/she has experienced or seen.This creates a feeling of anxiety ,depression, sleeplessness and unwanted thoughts.

According to the situation mentioned in question, Taryn is experiencing post-traumatic stress disorder. After the assaulted movement that took place with her, she got terrified and thus experiences nightmares.She is also not able to sleep properly due to this.