I believe the answer is: S<span>tress, trauma, or an extremely distressing situation.
Dissociative amnesia refers to the type of amnesia that happened due to the breakdown of memory and conciousness in order to flee from a certain situation. The overwhelming negative feeling that caused by stress or traume could cause the needs to 'flee' from their current emotional state.</span>
Out of the choices given, the media source which would be most reliable for new scientific breakthroughs is peer reviewed journals. The correct answer is A.