Answer: C- Civic education.
Former Supreme Court Justice David Souter answered during a 2012 open forum that the decline of civic education in the schools could lead a democracy to fail because of its effect on government.
Here is what he actually said: " But the reason I said I think it is the most significant problem that we’ve got is that I think some of the aspects of current American government that people on both sides find frustrating are in part a function of the inability of people to understand how government can and should function. It is a product of civic ignorance."
He also worries about a remark that Benjamin Franklin made about how "an ignorant people can never remain a free people". In other words, for Former Supreme Court Justice David Souter, democracy cannot survive to much ignorance.