What is the purpose of a liberal democracy?

A  The purpose of a liberal democracy is to create a progressive government that trends toward more liberal policies and regulations.

B  The purpose of a liberal democracy is to create a government aimed solely at protecting the international standing of a nation.

C  The purpose of a liberal democracy is to ensure that the individual citizens are all granted the same opportunities to change social or economic classes.

D  The purpose of a liberal democracy is to ensure the rights and liberties of individual citizens are preserved to some degree through the structure of the government.

E  The purpose of a liberal democracy is to establish a utopian state in which all needs of the citizens are met to the highest degree.