Which of the following was a key element of the american system? a) abolition of slavery, b) states' rights, c) protective tariffs, d) two-party politics  the answer is c

Protective tariffs  were a key element of the American system. These are tariffs that are enacted aiming to protect a domestic industry. Protective tariffs seek to make imported goods cost more than equivalent goods produced in the country, leading to the rise of sales of domestically produced goods; supporting local industry. Tariffs are also imposed in an attempt to increase government revenue, or to reduce an undesirable activity.

the best answer is a: comedy because the story or play is to make fun of someone