What Happens During Interpersonality Amnesia

What happens during interpersonality amnesia?

A) Specific events experienced by one personality are remembered only by that personality and not others.
B) Some alter personalities have total recall of past events, whereas some other personalities have only partial recall of past events.
C) Traumatic events experienced by one personality are remembered only by that personality and not others.
D) Specific events experienced by one personality are not remembered by that personality but are recalled by alter personalities.