Answer:
the interstate commerce act was the first federal agency monitoring business operations created in 1887 to oversee interstate railroad procedures. Sherman banned trade or commerce. Prohibition forbid by law of the manufacture transport, and sale of alcohol.
Explanation:
it was the Interstate Commerce Act :)
If the government never had separate the power into three branches the government would've been anarchy government who would be greedy to share his powers to the citizens and he would ignore the concern of the citizens.
1) The word "vassal" was mostly used for the knights who were responsible for providing the military defense for the king - the answer is "perform military service"
2) Magna Carta is known as the first document to limit the power of the king ! (3rd option)
3) this was the Holy Roman Empire, which was actually an association of independent states.
Im think the answer is A if im wrong im so sorry