In Classical Psychoanalysis, Why Is the Process Whereby the Therapist

In classical psychoanalysis, why is the process whereby the therapist interprets a patient's dreams often difficult?

A) because the patient may resist uncovering repressed material and deny the interpretation
B) because patients often forget their dreams
C) because the patient may relate to the therapist much as he or she did toward a parent figure
D) because the therapist may wish not to upset the patient with a negative interpretation