单选题 The author argues that the social insurance system should ______.

A、 provide benefits for the old, sick and unemployed
B、 encourage people to take on more social obligations
C、 guarantee everybody the right to be employed
D、 provide everyone the right to a minimum subsistence for a certain period

【正确答案】 D

【答案解析】[解析] 本题的依据句是“I would go one step further and argue that，even if these conditions are not present，in other words，one can claim this substance minimum without having to have any‘reason’．I would suggest，however, that it should be limited to a definite period of time．”从中可知 D项为正确答案。