With the example of her great-grandmother, the writer ______ psychologists' definition of happiness.

A．They may get happiness from games.
B．They may feel happy if they get a role in a school play.
C．They feel happy all the time.
D．An ordinary event may put them at a pinnacle of sheer delight.

A．adults don't experience excitement any more
B．popularity has no attraction to adults
C．love is a complicated experience of happiness for adults
D．adults don't care whether to be invited to a party or not