An anxiety disorder brought on by a severe trauma such as rape or assault is cal!

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E. actually study for your tests

But its C

I will explain all the four above.
1. OCD is caused by long term stress.
2. ED is caused by deficiency of serotonin etc
3. PTSD. is caused by sudden and unexpected assault from a heavy upon a poor and slender personality who cannot cope up with the impact.
4. Schizophrenia is bipolar disorder causes as for 2. above
Your anwer is no2

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C...post-traumatic stress disorder

Military experience

C. Post-traumatic stress disorder.

C. Post-traumatic Stress Disorder

post-traumatic stress disorder

C. Like everyone else said.

That's kind of common sense when you look at the other answers.

or combat or you need to study for your test or your bored.
Answer is PTSD.