有关系S(SNO, SNAME, SAGE)，C(CNO, CNAME)，SC(SNO, CNO, GRADE)。其中SNO是学生号，SNAME是学生姓名，SAGE是学生年龄， CNO是课程号，CNAME是课程名称，GRADE是成绩。以下（ ）SQL语句可以实现查询没有选修'C002'号课程的学生姓名。
A、SELECT SNAME FROM S, SC WHERE S.SNO=SC.SNO AND CNO !='C002'
B、SELECT SNAME FROM S WHERE SNO NOT IN (SELECT SNO FROM SC WHERE CNO='C002')
C、SELECT SNAME FROM S WHERE NOT EXISTS (SELECT * FROM SC WHERE S.SNO=SC.SNO AND CNO='C002')
D、SELECT SNAME FROM S WHERE EXISTS (SELECT * FROM SC WHERE S.SNO=SC.SNO AND CNO !='C002')