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 applicatio