Identify a True Statement About Post-Traumatic Stress Disorder (PTSD)

Identify a true statement about post-traumatic stress disorder (PTSD) .

A) An individual has to show symptoms immediately after a traumatic event to be diagnosed with PTSD.
B) PTSD can occur in those who witness a traumatic event and also in those who only hear about it.
C) An individual has to show symptoms within a week after a traumatic event to be diagnosed with PTSD.
D) Only those individuals who directly experience a trauma can show symptoms of PTSD.