The correct answer to this open question is the following.
“If we remembered everything, we should on most occasions be as ill off as if we remembered nothing.” William James.
What Willia James tried to share with this quote was that people have to forget and live. That it is not a good thing to carry the burdens of life, generating resentments all your life. Whatever happened one year ago or ten years ago, it's in the past. To be happy you have to free of those burdens that come from time to time and produce bad feelings, just by reminding you what happened or who made what to who.
So for me is a good quote to remind ourselves to forgive and forget, and keep on living a happy life without resentments.
A is the answer to the question and b is the answer to the second
The answer is (a.) psychodynamic therapy
The Psychodynamic psychotherapy is a form of depth psychology which primarily focuses on revealing the unconscious content of a person’s psyche to alleviate the psychic tension. It takes many forms and one of it is when psychopathology is develop from the early experiences during childhood.