单选题 ______are the places where, in the 17th to 19th centuries in Britain, very poor, homeless people did very unpleasant jobs in return for food and shelter.
【正确答案】 C
【答案解析】解析：救济院又称济贫院、救贫院，是为穷人提供工作，为弱者提供生机的机构。