设有学生表S（学号，姓名，性别，年龄），查询所有年龄小于等于18岁的女同学、并按年龄进行降序排序生成新的表WS，正确的SQL命令是（）。

A．SELECT*FROM s WHERE 性别=′女′AND年龄<=18 ORDER BY 4 DESC INTO TABLE WS
B．SELECT * FROM S WHERE性别=′女′AND年龄<=18 ORDER BY年龄 INTO TABLE WS
C．SELECT * FROM S WHERE性别=′女′AND年龄<=18 ORDER BY ′年龄′ DESC INTO TABLE WS
D．SELECT * FROM S WHERE性别=′女′OR年龄<=1 8 ORDER BY′年龄′ ASC INTO TARLE WS