单项选择题
A.确信EmployeeID是TestKingEmployees的第一列. B.确信EmployeeID是TestKingEmployees中每行的unique. C.确信TestKingEmployees在EmployeeID上有一个主键. D.确信TestKingEmployees在EmployeeID上按升序分类.
A.A B.B C.C D.D