3 The greatest achievements of the Qin dynasty were
building projects such as the Great vall.
paper.
inventions such as the seismograph.
the voyages of Zheng He.

Which of the following policies is an example of a command-and-control policy? a. subsidies to education b. maximum levels of pollution that factories may emit c. tradable pollution permits d. none of the above is an example of a command-and-control policy.