执行 AT (“a+ b=c”，“+”)语句后，屏幕显示的结果为 ______。

A．SELECT姓名,COUNT(*)AS 外币种类 FROM 持有数；GROUP BY 姓名 HAVING COUNT(*)＞=4；ORDER BY 外币种类，姓名 DESC
B．SELECT 姓名,COUNT (*)AS 外币种类 FROM 持有数；GROUP BY 姓名 HAVING COUNT(*)＞=4；ORDER BY COUNT(*)，姓名 DESC
C．SELECT 姓名,COUNT (*)AS 外币种类 FROM持有数；GROUP BY 姓名 HAVING COUNT(*)＞=4；ORDER BY 外币种类 AND 姓名 DESC
D．SELECT 姓名,COUNT(*) AS 外币种类 FROM 持有数；GROUP BY 姓名 HAVING COUNT(*)＞=4；ORDER BY 外币种类+姓名 DESC