Answer: Federalism: A system in which power is divided between the national and state governments.
Explanation:
Because the stars could vote the status of slavery.
Social stratification<span> is a society's categorization of people into </span>socioeconomic<span>strata, based upon their occupation and </span>income<span>, wealth and social </span>status<span>, or derived power (social and political). ... Moreover, a social stratum can be formed upon the bases of kinship or caste, or both.</span>
I am not going to answer in a paragraph of 125 words, but I will give you the answer to the first question; The United States didn't want another country to fall to communism. They officially got involved after the attack of the Gulf of Tonkin (U.S destroyers were stationed there and a radio came in that said they had been fired upon by North Vietnamese forces). (45 words BTW).