Ateachershowedstudentsanexampleandexplainedtheusageofpastperfecttense,andaskedstudentstolistten"pastperfecttense"sentencesbyimitatingthatexample．What'stheteacher'sgrammarteachingmethod?
A.Consolidation．
B.Presentation．
C.Deduction．
D.Induction．
正确答案是C