题目内容
（请给出正确答案）
[主观题]
The most serious problem of large centralized correctional institutions is that ______.A．t
The most serious problem of large centralized correctional institutions is that ______.
A．they make no distinction between adult offenders and juvenile offenders
B．they make more delinquent youths lose hope for their future
C．their efforts to rehabilitate delinquent youths are completely in vain
D．they provide chances for delinquent youths to be more knowledgeable in crime
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