Answer:
C. a unitary system
Explanation:
A country that is run on a Unitary system is fully controlled by one single entity that has supreme authority in terms of creating legislations. In most cases, this single entity is referred to as the central government. They do not let their local districts have their own autonomy. Every single decisions and legislations that made by the Central government must be followed by all citizens in that country.
Typically, Unitary system could only work in a country with small area and typically low population. It would be really inefficient in large countries like United States or India. Example of successful countries that use Unitary System are: France, Finland, and Singapore.
Wilmot Proviso was the legislation to end slavery in the upcoming states after the mexico-american war. It was was controversial since it was rejected.
It was a United States naval officer/ historian, also known to be a propagandist to expansion, named Alfred Thayer Mahan who wanted to expand the extent of capacity of the United States and its navy. He wrote “The Influence of Sea Power upon History”. It stated his idea that the countries with the biggest navies and greater sea power over others who could govern the world. With his principles, and knowing that US had at that time the elements of the capability to expand its greatness, he created strategies based on commerce trading and coastal defense to support the Manifest Destiny. Manifest Destiny states that it is the United States who was the ones who were destined to expand across North America.
Because Slate was more common in wet microclimates.
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D. Pull troops out of France and russia