题目内容

What assumption lies behind the practice of senior citizen discounts？

A. Businesses, having made a lot of profits, should do something for society in return.
B. Old people are entitled to special treatment for the contribution they made to society.
C. The elderly, being financially underprivileged, need humane help from society.
D. Senior citizen discounts can make up for the inadequacy of the Social Security system.

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