An adult accompanying with two children aged 1 and 3 years old, how much will the adult pay for the travel if the normal fare is $ 220

A．an optimist
B．a pessimist
C．a psychologist
D．the writer of this passage

A．the dividing line between optimists and pessimists
B．young women today suffer a lot in doing housework
C．most of young wives are pessimists
D．the pessimists are used to thinking of everything negatively