查询选修了课程号为“C1”的学生的姓名和年龄，若用下列SQL的SELECT语句表达时，错误的是( )。
A．SELECT SNAME，AGE FROM S WHERE
S．S#=(SELECT S
C．S#FROM SC WHERE
C．C#='C1')
B．SELECT SNAME，AGE FROM S，SC WHERE
S．S#=S
C．S# AND S
C．C#='C1'
C．SELECT SNAME，AGE FROM S，SC WHERE
S．S#=S
C．S# AND S
C．C#='C1' ORDERBY
S．S#
D．SELECT SNAME，AGE FROM S WHERE
S．S#=(SELECT S
C．S# FROM SC WHERE S
C．C#='C1')
