Final answer:
Andrew is likely suffering from Post-traumatic stress disorder (PTSD) due to his flashbacks and recurrent thoughts of traumatic events experienced while serving in the military.
Step-by-step explanation:
Andrew, a military veteran who experiences flashbacks and recurrent thoughts of traumatic events, is likely suffering from Post-traumatic stress disorder (PTSD). This condition is an anxiety disorder that can develop after exposure to severe psychological trauma, a common issue that has affected many veterans from conflicts like the Vietnam War. The symptoms of PTSD include flashbacks, severe anxiety, as well as uncontrollable thoughts about the traumatic event.
Of the options provided, including bipolar disorder, generalized anxiety disorder, obsessive-compulsive disorder (OCD), and PTSD, Andrew's symptoms align closely with PTSD. This condition was not widely recognized or treated during earlier conflicts, leading to numerous veterans suffering long-term effects well into old age, often self-medicating with substances like alcohol to cope