查询选修了a001号课程且成绩在60分以上的所有学生

A.select * from student where cid=’a001’ and grade>=60

B.select * from course where cid=’a001’ and grade>=60

C.select * from sc where cid=’a001’ and grade>=60

D.select * from sc where cid=’a001’

正确答案：select * from sc where cid=’a001’ and grade>=60