The thought that contributed to changes in relationships between citizens and governments according to enlightenment thinkers was: D. Rights and liberties should be limited by the need for social order.
John Locke, Thomas Hobbes and Jean-Jacques Rousseau, all of them Enlightenment Thinkers, agreed that a social contract, in which the government's authority lies in the consent of the people, is necessary for man to live in civil society. It is said that when one citizen breaks the Law of Nature, in which all men are born equal and with the right to life, liberty and property, the transgressor and the victim get into a state of war. As a consequence, says Locke, individuals enter into civil society to protect their natural rights via a common authority, such as courts.
While answers "B" and "C" can't be correct since they state the opposite of the ideals proposed by Enlightenment thinkers, answer "A" could be correct but it's not exactly the most important ideal that Enlightenment era introduced and that, in turn, impacted on relationships between citizens and governments.
