Membership in either of the two major parties is a. closely regulated by federal law.
b. closely regulated by State law.
based on economic status.
c. Based on economic status
d. Based on personal choice.

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.