The institutional structure of an international organization may also change over time. For example, the Nordic Council was established in 1952 with the aim of fostering cooperation between Denmark, Iceland, Norway, and Sweden (Nordic Council, 2018a). As is also understood from the information given, the correct answer is A. In order to deepen the cooperation, the Nordic Council of Ministers was created in 1971 to complement the Council as well as a Secretariat was set up. Moreover, the organization enlarged: in 1955 Finland, in 1970 the Faroe Islands and Åland, and in 1984 Greenland joined the organization. The Council of Ministers consists of sub-groups focusing on different issue areas, including labor, sustainable growth, equality, culture, and environment.

The UN General Assembly is an excellent example of an interstate organ where each member state has one vote. The Parliamentary Assembly of the Council of Europe illustrates a parliamentary organ, which is composed of 324 parliamentarians from 47 member states.

Moreover, some IOs have judicial bodies in order to settle the disputes between the members such as the International Court of Justice, the principal judicial organ of the UN, or to act as the ‘court of last resort’ such as the European Court of Human Rights.