2. all of the following are weaknesses of a command economy except that it

a) requires a large decision-making bureaucracy.
b) provides few incentives for people to work hard.
c) lacks the flexibility to deal with minor problems.
d) can change direction drastically in a short 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.