Connecting the past to the present you to know how people have shown their independence from others chosen to deal with conflict maintained unity through time solved their problems hidden their true nature from the world

Which of the following  bestillustrates a negative reinforcer?               a.  copland gives up candy to stave off chronic acid indigestion.    b.  nancy learns that she prefers chocolate over vanilla.    c.  carmine changes his major to english lit after failing a math exam.    d.  on a hot day, lindberg always drinks lemonade.