【单选题】

检索选修四门以上课程的学生总成绩(不统计不及格的课程 )，并要求按总成绩的降序捧列出来。正确的 SElECT 语句是

A. SELECT S#，SUM(GRADE)FROM SC WHERE GRADE>=60 CROUP BY S# ORDER BY 2 DESC HAVING COUNT(*)>=4
B. SELECT S#，SUM(GRADE)FROM SC WHERE GRADE>=60 GROUP BY S# HAVING COUNT(*)>=4 ORDER BY 2 DESC
C. SELECT S#，SUM(GRADE)FROM SC WHERE GRADE>=60 HAVINC COUNT(*)>=4 GROUP BY S# ORDER BY 2 DESC
D. SELECT S#，SUM(GRADE) FROM SC WHERE GRADE＞=60 ORDER BY2 DESC GROUP BY S# HAVING COUNT(*)＞=4