A scientist interested in general knowledge about oxygen would probably call his approach ______.

A．providing chances for vocational training and reemployment
B．sending them to private schools to receive remedial education
C．making use of small, decentralized, community-based correctional programmes
D．allowing them to live near their original communities

A．Large centralized correctional institutions can effectively regulate young offenders.
B．Community-based programmes cost less than traditional ways in dealing with delinquent.
C．The wise way to save young criminals is sending them to public institutions.
D．Institutionalization successfully returns young offenders to their communities.