Elementary and secondary education is（）

A.it contributes to the success of individuals
B.it contributes to the strengthening of national strength
C.it prepares the young people for future development
D.Both A and B

A.have been largely achieved
B.have largely not been achieved
C.have been achieved in some significant areas
D.have not been achieved at all

A.elimination of drugs and violence from school
B.the increase of high-school graduation rate to 86%
C.competence in forging language,mathematics,science,history and geography
D.the increase of adult literacy rate