Arthur was a Navy Seal for decades and was often involved in dangerous missions in Iraq, Afghanistan, and other war-ravaged countries

Arthur is now retired, but each night he wakes up sweating after having intensely vivid dreams of his missions, the suffering and deaths of causalities, and the deaths of his fellow soldiers. Arthur is experiencing a) post-traumatic stress disorder.
b) coping skill deficiency disorder.
c) loneliness and a lack of social support.
d) self-identification difficulties.

a