A．To show people how to get their lives back to normal.
B．To show how difficult it is for people to lose weight.
C．To remind people to check the calories on food bags.
D．To illustrate how easily people abandon their goals.

A．To combat competition and raise productivity.
B．To provide them with more job opportunities.
C．To help them maintain their living standard.
D．To prevent them from holding a second job.