You issued the following statement：   SQL> ALTER SESSION SET NLS_LANG=FRENCH_CANADA.WE8ISO8859P1；   Which parameter is NOT overridden by using the above statement？（）  

• A、 the value of the NLS_LANGUAGE variable
• B、 the value of the NLS_TERRITORY variable
• C、 the value of the NLS_CURRENCY variable
• D、the character encoding scheme used by the client application