查询选修了课程号为“C2”的学生号和姓名，若用下列SQL的SELECT语句表达时，哪一个是错误的
A．SELECT S#，SNAME FROM S WHERE S# (SELECT S S# FROM SC WHERE C#='C2')
B．SELECT S#，SNAME FROMS，SC WHERE S#=SS# AND C#='C2'
C．SELECT S#，SNAME FROM S,SC WHERE S=SS# AND C#='C2'ORDER BY S#．
D．SELECTS#，SNAME FROM S WHERE S# IN(SELECT S S# FROM SC WHERE C#='C2')