Which of the following was a key element of the american system? states' rights protective tariffs the abolition of slavery two-party politics

Protective tariffs were a key element of the American System.

Explanation:

The American system was a protectionist economic strategy adopted in the United States after the Anglo-American War of 1812.

The strategy was based on the imposition of heavy tariffs to finance the construction of infrastructures, the development of a central bank that encouraged the company and the strengthening of the internal currency. The tariffs would also have allowed the US to effectively counteract the dumping actions carried out mainly by the British Empire.

In large part, the provision was based on the thought of the American School of Alexander Hamilton.

lying without the limits of the several states; and may permit them, at such times, and in such manner as it

since most of current immigration into the u.s., both legal and illegal, is coming from latin america. it would be very difficult to imagine or rationalize a country my fellow citizens are trying desperately to flee into, would pose a threat to my prosperity or freedom. since the u.s. has a long history of intervention, but no record of permanent occupation, i would not feel oppression is the main objective.  

the largest free trade nation, along with the largest gdp in the world wanting to expand it's economic policy on us, and including us, could only be positive. the u.s. government has no interest in, or way of simply forcing american culture on us. and has no track record of it. other nations that adopted american social culture, or "americanization" did so voluntarily, mainly through the choice of allowing american businesses and u.s. citizens to come into their nations, as free operatives.