The correct answer is D) the United Kingdom.
The country that originated the concept of parliamentary democracy was the United Kingdom.
This system of government started to take form in England with the influence of Simon de Monfort, considered the father of the representative government in 1258. Later, in the 17th century, the Parliament supported ideas of liberal democracy and the passing of the British Bills of Rights in 1689. In the modern parliamentary system of the United Kingdom, there is a Primer Minister and two chambers in Parliament: the House of Lords and the House of Commons.