The answer to this question is: A. disease
Back then, People still haven't developed vaccines or other form of antibiotics like we have today.
In 16th century, the naive american population was heavily decreased because of the small pox epidemic. Even though this illness could be easily treated today, during that time this illness was considered very lethal for the Native American people.
The right answer would be a. Promote freer trade with Canada and Mexico.
As the name indicates, the North American Free Trade Agreement (or <em>NAFTA</em> for short), was designed with the intent to encourage the economic growth of the three countries involved, promoting fair competition, job growth and an increase in imports.
This was done by eliminating almost all tariffs and taxes involved on imports and exports between Mexico, the United States and Canada.
A limited central government linking independent states
The answer is c ( u.s. court of appeals )
I believe that Nicola Sacco was convicted of murder in World War I.
Hope this helps!
~Mistermistyeyed.