【单选题】

Prison Systems_________(46).

A、long time ago, prisons were established for detention only. People were kept in prison to wait for torture, death, or other cruel punishment. Near the end of the MiddleAges the people ofEurope became angry about the cruel acts of that system, and disagreed strongly. Therefore, less cruel techniques of punishment were useD、______ (47).The early settlers ofAmerica brought with them the idea of isolating prisoners._________(48).After a long isolation, the prisoners could be allowed to go because they would not do any more wrong acts.At the end of the 18th century, however, a religious stopped that system. About the time of theAmericanCivil War, a new place for young offenders was built in N.Y. _________(49). At the end of the 19th century, a new idea was introduceD、It allowed prisoners to work together during the day. It also reduced problems of administration._________(50).
A、For example, people were sent away from their country and were never allowed to come back or they were kept in prison.B、They could not see or talk to each other and could only read and exercise by themselves.C、This prison system has been employed in our country.D、Later many prisons were built inAmerica and abroad which operated on this ide
A、E、In the history of the human race, prisons have only recently been used to punish people for wrong acts.F. This new system worked on the principles of classifying prisoners on the basis of age, giving them an education and training them.