After surviving an Amtrak derailment, John experienced frequent, vivid thoughts and images of the accident for several months. He also had problems sleeping and was irritable and withdrawn. John is suffering from:

A) major depression.
B) posttraumatic stress disorder.
C) generalized anxiety disorder.
D) panic disorder.

Posttraumatic Stress Disorder

A mental health condition triggered by experiencing or seeing a terrifying event, characterized by flashbacks, severe anxiety, and uncontrollable thoughts about the event.

Major Depression

A mood disorder characterized by a persistent feeling of sadness, loss of interest, and could significantly interfere with daily functioning.

Amtrak Derailment

An incident involving the derailment of an Amtrak train, which can lead to investigations into safety practices and infrastructure.