During the 1930s the national labor relations act , the fair labor standards act , and the glass-steal all banking reform act were passed by congress. from these actions we can conclude that the government was

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.