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.
I am thinking the answer would be either c or d. Just because slavery wasn't abolished until 1865, and slaves were always in great demand, they picked cotton, did everything that had the word work in it, which would help economically. But d could work as well, because if the landowner is building a school, then he's helping the children in the economy have a better education. So yes, d is your best bet.
It would be "rope" that led to the closing of the open range, as farmers started to close off their land to other people and cattle. Barbed wire was not generally used.
He is a king and he is famous for being king
D. Poverty
Hope this helps :)
