They shared cultural ties, especially in language.
The correct answer is state legislator. By definition, state legislator is a representative of a legislative body which is a political subdivision in a federal system of government.
The primary goal of the United Nations is to promote peace and unity among nations, and by this to prevent World Wars ( and other wars) in the future. The UN establishes and helps maintain friendly relations between countries.
Another aim of the UN is to protect human rights worldwide.
Research ethics are general rules that are followed when doing experiments to insure that no permanent harm comes to the test subjects or anybody else as a result of the research. This is perhaps even more important in sociology because the test subjects are human.