Which of the Following Is Illustrative of a Memory Dissociation

Which of the following is illustrative of a memory dissociation?

A) a group of young and old adults both recall information to form a classic serial position curve
B) a group of males recall more information, from a list of words, when compared to a group of females
C) a group of amnesic patients recall less information from long-term memory than a group of non-amnesics
D) none of the above