Why are special sessions of congress rarely called?

a. the financial cost is too high.
b. congressional numbers would make it too cumbersome.
c. congress already meets nearly year-round.
d. it would take too much time

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.