A. To keep members of the group busy doing something.
B. To make the people there understand the meaning of work.
C. To find a way to solve the generation gap.
D. To help people find enjoyment in work.

A. currently wealth flows from old generation to younger generation
B. traditionally wealth flows from younger generation to old generation
C. with the increasingly big population of over 50, the trend arises that wealth flows from younger generation to old generation
D. with more and more people of over 50, traditions have been reversed