Preconscious contains past childhood events and basic drives.
In psychoanalysis, preconscious are the thoughts which are unconscious at the particular moment in question, but which are not repressed and are therefore available for recall and easily 'capable of becoming conscious'—a phrase attributed by Sigmund Freud to Joseph Breuer.
The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.