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Considering the available options, the events that could be a threat to a state’s sovereignty at the national scale while holding a region together at the global scale is "<u>Admittance into a supranational organization such as the European Union."</u>
<h3>What is a Supranational Organization?</h3>
A Supranational organization is a type of organization in which the members, usually the countries, surrender their power and autonomy on specific issues, precisely internal matters concerning all the members, to the organization's rulings.
The advantage of being a member of a Supranational organization is that it keeps countries together and formidable on a world scale.
For example, the European Union, where all the members vote to make decisions on issues concerning all the organization members.
Hence, in this case, it is concluded that the correct answer is option C. "<u>Admittance into a supranational organization such as the European Union."</u>
Learn more about European Union here: brainly.com/question/13929900
<span>The European explorations completely changed the entire "New World." For example, the Aztec capital, Mexico, was the center of arguably one of the most powerful and advanced civilizations in the world during the explorations. It was a city of over 1 million people in population, something generally unheard of by Europeans during the 15th and 16th century. After Cortez was driven out of the capital by the warriors within it, he left behind a small pox epidemic that, some historians have estimated, killed up to 90% of their population. Cortez later returned and destroyed what was left of the city. </span>
<span>Similar events occured elsewhere throughout the Americas, in all killing more than half the native populations through disease and war. Most of those who survived became slaves, or became second class citizens in their own lands, subordinate to the European population who began emigrating.</span>
Answer: greater demand for government spending on pensions and healthcare for the elderly