<span>the answer is social class hierarchy
What distinguishes a civilization from a simple group of people is the separation of works/job (specialization of labors) that humans do so every needs of all members in that civilizations is fulfilled.
During this separation, some people will hold more so-called 'important' jobs compared to others (such as kings, business leaders, high-priests, etc) and will naturally formed a social hierarchy among them.</span>
It was "<span>2. Meriwether Lewis and William Clark" who famously </span>explored the Louisiana Territory in the early 1800s--a territory purchased by Thomas Jefferson from Napoleonic France for an incredibly small amount of money.
I think it is b. Iroquois
The answer you’re looking for I believe, is Commerce.
C, it made it okay to discriminate against african americans.
