The correct option is D To ensure that the succeeding generations see war at global level.
The first and foremost objective or purpose of the UN is to maintain peace and security in the international arena. The UN strives to develop and maintain friendly relations among nations based on equal rights and self-determination of people. It also attempts to achieve international co-operation to solve issues of economic, social, cultural, or humanitarian nature. The United Nations Organisation ensures that war does not break out again at the global level.