A nursing instructor is explaining the etiology of trauma-related disorders from a learning theory perspective. Which student statement indicates that learning has occurred?

A. "How clients perceive events and view the world affect their response to trauma."
B. "The psychic numbing in PTSD is a result of negative reinforcement."
C. "The individual becomes addicted to the trauma owing to an endogenous opioid response."
D. "Believing that the world is meaningful and controllable can protect an individual from PTSD."