I think the correct answer from the choices listed above is option C. It is Taylor's death, while in office, that allowed the Compromise of 1850 to be approved. Zachary Taylor was the 12th President of the United States, serving from March 1849 until his death in July 1850.
it is a government in which power is split between a federal government and smaller sections of government, in the US, that would be the federal and state governments
A mercantile system is regulated by the government ensuring that all products and income produced benefited the states.
A free enterprise system is only regulated by supplied and the demand of goods, with no interference from the government.
Hope that helped!