【单选题】

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