Dorian Was Only 10 Miles Away from Mount St

Multiple Choice

Dorian was only 10 miles away from Mount St. Helens when it erupted with one of the largest blasts in history. There was ash and lava everywhere, and he was terrified and sure he was going to die. When rescue teams found him a week later, he was cold, hungry, and scared. More than a year later, he still had nightmares and woke up in a cold sweat. This description BEST fits a(n) :

A) phobia.
B) acute stress disorder.
C) generalized anxiety disorder.
D) posttraumatic stress disorder.