从Student表检索年龄小于21岁的男学生信息,最规范的SQL语句是()。
A、Select * From Student Where Ssex='男' Or Sage<'21'<br> B、Select * From Student Where Ssex='男' Or Sage<21<br> C、Select * From Student Where Ssex=男 And Sage<'21'<br> D、Select * From Student Where Ssex='男' And Sage<21<br>