Of the Following, Which Statement Would Most Likely Be Endorsed

Of the following, which statement would most likely be endorsed by Sigmund Freud?

A) People are capable of making conscious, rational choices, which can lead to growth and psychological health.
B) Because the mind is both useful and used, we should examine how it helps us adapt to a complex and changing world.
C) Human behaviour is primarily determined by unconscious mental forces and conflicts
D) Because mental events cannot be observed, psychology should restrict its focus to observable, measurable behaviour.