This passage gives a general description of the development and functions of currency.

A．To see if there was a deliberate cover-up of the problem.
B．To find out the extent of the consequences of the case.
C．To make sure that the school principals were innocent.
D．To stop the voters approving the $ 212 million bond issue.

A．attract greater public attention to their needs
B．appeal to the public for contributions and donations
C．expose officials who neglected their duties
D．keep people properly informed of the crisis