If you define American as a person who lives in America - then the first Americans were the native Americans who traveled from Asia many thousands years ago and they settled the whole American continent
The Louisiana Purchase: Jefferson's constitutional gamble. On October 20, 1803, the Senate ratified a treaty with France, promoted by President Thomas Jefferson, that doubled the size of the United States. ... The land involved in the 830,000 square mile treaty would eventually encompass 15 states.
B they help preserve knowledge from ancient Greek and Roman text
The answer is D because
Buddhists believe that nothing is fixed or permanent and that change is always possible. The path to Enlightenment is through the practice and development of morality, meditation and wisdom.
