Why is there such a high likelihood of long-lasting psychological problems

resulting from active combat experiences?

a. Research has revealed that those who enlist are more likely to be emotionally unstable.
b. When task-oriented coping strategies are ineffective, emotional breakdown is inevitable.
c. Combat situations present highly stressful situations for which there may be no truly effective coping mechanisms.
d. Basic training is ineffective at preparing new recruits for any of the challenges they will likely face.

Thanks for the answer, I sent you a PM for another one.