Answer:
A. A memory that is emotionally intense
C. A memory that contributes to our sense of self
Explanation:
Although many memories seem to fade as time goes by or even change so that their content depends on our emotions at the time of recalling, self-defining memories are said to quite accurately preserve events, details and our feelings regardless of the period of time that passed.
Of course, not every memory is self-defining; there are some criteria that make them special.
First, those are the menories of the events that shaped us, made us who we are now, how we see ourselves and in that way that contribute to our sense of self.
Next, these memories are quite vivid; and after many years we can still recall details of that particular event.
Another important feature is that they are emotionally intense; it doesn't matter if that emotion is positive or not. These memories always bring back the feeling we had at the original moment: happines, fear, anxiety, love, sadness etc.
Also, these memories change as we grow old; what is a self-defining memory at the present time doesn't have to be one in thirty years time.
