题目选项分析

According to psychoanalytic theory, people have unconscious beliefs that are kept from becoming conscious by a psychological mechanism termed "repression." Researchers investigating the nature of this mechanism observed occasions on which a patient undergoing therapy became aware of and expressed a previously unconscious belief. They found that such occasions were marked by an unusual decrease in the patient's level of anxiety.

If the information above is true, and if the researchers' investigation was properly conducted, then which of the following must also be true?

【选项】Although the beliefs on which the mechanism of repression works are all unconscious, the operation of the mechanism itself is something of which patients are consciously aware