Which of the following statements about nation-states is accurate

A nation-state is a political entity and a sovereign state that is composed of a homogenous group of people who share a common culture, history, language, and identity. Below are accurate statements about nation-states:

1. Nation-states emerged after the Peace of Westphalia in 1648, which marked the beginning of the modern nation-state system.
2. Nation-states have defined territorial boundaries and maintain authority over their respective territories.
3. Nation-states promote the idea of citizenship, where individuals are members of the state and have certain rights and responsibilities.
4. Nation-states typically have their own governments, administrative systems, and legal frameworks to govern their societies.
5. Nationalism often plays a significant role in nation-states, as it fosters a sense of unity, pride, and loyalty among the population.
6. Nation-states can possess varying degrees of political and economic power on the global stage.
7. The majority of countries in the world today are nation-states, but there are exceptions where multiple nations coexist within a single state.