从学生表显示所有学生的信息，按照专业的升序排列，专业相同再按照年龄的降序(    )。
A、Select * From Student Order by Smajor DESC , Sage  ASC
B、Select * From Student Order by Smajor, Sage  DESC
C、Select * From Student Order by Smajor, Sage  ASC
D、Select * From Student Order by Smajor ASC, Sage