Defense mechanisms unconsciously distort reality and reduce anxiety, but they are primarily associated with the ego, not the id. While Carl Jung influenced many psychological concepts, the specific idea of defense mechanisms was primarily introduced by Sigmund Freud. Thus, statements about their origin and function help clarify these psychological tools. ;
The true statements about defense mechanisms are that they work by unconsciously distorting reality and serve to reduce anxiety. They are not used by the id or exclusively identified by Carl Jung, but rather were primarily developed by Sigmund Freud. Therefore, the correct options are B and C.
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