A Wife of a Returning Combat Veteran Has Called EMS

A wife of a returning combat veteran has called EMS because her husband is complaining of constant headaches. You ask about post-traumatic stress disorder (PTSD) or traumatic brain injury (TBI) and she states that he was injured by an improvised explosive device in Iraq, but cannot remember the event. She continues on by telling you that he has had numerous CTs and MRIs of head and has been told by his family doctor that there is no sign of injury. Regarding either of these medical conditions, you realize that:

A) TBI may exist despite the negative findings of the CT and MRI tests.
B) PTSD is likely and requires immediate identification and treatment for total recovery.
C) TBI and PTSD most likely do not exist since there is no memory of the event.
D) TBI and PTSD are not likely since the patient does not have associated symptoms like dizziness.