If You Are a Government Official, Under Which of the Following

Multiple Choice

If you are a government official, under which of the following situations would you opt for a command and control solution to an externality problem?
I. Lack of running water in part of the country is exacerbating the spread of cholera in the population.
II. Foreign ships are dumping toxic wastes in the waters off your country's shores.
III. A large number of banks fail due to excessive risk taking.

A) I only
B) I and II only
C) II and III only
D) I, II, and III