单项选择题
A.1873 B.1874 C.1876 D.None of the above
A.To select, top students. B.To know who had received ordinary schooling. C.To put students in a right order. D.To make sure who required particular treatment.
A.its purpose, basis and contents B.its purpose, items and tasks C.its purpose, method and results D.its purpose, basis and assumptions