Liberals supported which political system?

Correct answer: Government with an elected parliament

In the historical context of nineteenth-century Europe, liberals generally opposed arbitrary rule and wanted government to operate through laws and representative institutions. They supported individual rights, equality before law and, in many cases, an elected parliament. Their idea was not simply that a king should rule without limits. Political rights were not always extended equally to every person at first, but the central principle was constitutional government with representation rather than absolute monarchy.

Option D is correct because a government with an elected parliament expresses the liberal preference for representation and rule by law. Option A, absolute monarchy, gives unrestricted power to the ruler and conflicts with this principle. Options B and C also describe older hierarchical or monarchical arrangements rather than liberal political aims. The supplied answer is consistent, with the qualification that early liberals did not always demand universal suffrage immediately.