Martha grew up in a dysfunctional family. At the age of eight, she was abused by a relative. After graduating from college and getting a job, Martha moved out of her parents' house and started living with a friend. Now, as an adult, Martha is unable to recall memories of the childhood abuse. However, she sometimes has nightmares about it. According to Freud's theory, which of the following defense mechanisms is Martha's ego most likely using?
Question 75 options:

sublimation

projection

regression

repression