Survivors' vivid memories of Nazi death camp experiences most clearly challenge Freud's concept of

A) fixation.
B) repression.
C) the Oedipus complex.
D) motivational conflict.

Survivor's vivid memories of Nazi death camp experiences challenge Freud's concept of repression because according to Freud, traumatic experiences are often repressed and kept hidden in the unconscious mind. However, survivors of the Holocaust have clear and vivid memories of their traumatic experiences, which goes against Freud's theory of repression.