How did opec wield its power in 1973?
a.
it began producing more oil for more nations.
b.
it stopped sending oil to countries that supported israel.
c.
it encouraged the production of secondary products.
d.
it invited the leaders of all muslim countries to join.

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.