Which of the following is a compound word

A．seldom works well in practice
B．usually fails to prevent an offender from committing further offenses
C．is only applicable to those offenders who commit serious driving offenses
D．may be applied to offenders who have been convicted of various types of offenses

A．ways of dealing with offenders
B．the probation system
C．the suspension of sentence on the offender
D．the suspended sentence of imprisonment