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排列出来。正确的SELECT语句是( )。

A. SELECT S#，SUM(GRADE)FROM SC
B. WHERE GRADE＞=60
C. GROUP BY S#
D. ORDER BY 2 DESC
E. HAVING COUNT(*)＞=4
F. SELECT S#，SUM(GRADE)FROM SC
G. WHERE GRADE＞=60
H. GROUP BY S#
I. HAVING COUNT(*)＞=4
J. ORDER BY 2 DESC
K. SELECT S#，SUM(GRADE)FROM SC
L. WHERE GRADE＞=60
M. HAVING COUNT(*)＞=4
N. GROUP BY S#
ORDER BY 2 DESC
P. SELECT S#，SUM(GRADE) FROM SC
Q. WHERE GRADE＞=60
R. ORDER BY2 DESC
S. GROUP BY S#
T. HAVING COUNT(*)＞=4