When a Person Loses Consciousness,working Memory Is Interrupted and Memories

Multiple Choice

When a person loses consciousness,working memory is interrupted and memories are abolished for all that happened for a variable period of time before the blow that caused unconsciousness.Why?

A) The traumatic blow to the head caused a concussion through violent displacement of the brain in the skull.
B) There was a deficiency of adequate blood flow to the brain.
C) There was an interruption in the constant stream of neuron potentials to memory facilitation brain areas.
D) Conflicting external interference prevents conversion of short-term to long-term memory.
E) This is an area of neurological research which has not achieved any satisfying conclusions at the present time.