You have been dispatched to a Veteran's Administration (VA) clinic for a male patient with a behavioral emergency. On scene, the VA physician tells you that the patient is a returning veteran with newly diagnosed post-traumatic stress disorder (PTSD). Based on this, you would realize:

A) the veteran was involved in active combat while in the service.
B) the veteran may have been in the military but never involved in combat.
C) the veteran most likely had a prior history of mental health issues.
D) the veteran has sustained physical injury to his brain.

B