The answer is D. A Supreme court Decision to move the Cherokee west of the Mississippi River. Here is text from Wikipedia,
"Indian removal was a genocide in the 19th century whereby Native Americans were forced by the United States government to leave their ancestral homelands in the eastern United States to lands west of the Mississippi River, specifically to a designated Indian Territory (roughly, modern Oklahoma)."
The new england and middle colonies developed the triangular trade route with africa and the west indies.
Answer: triangular
Historians would be most likely to study them to determine what they once held. Archaeologists would be the ones to find the clay jars and dig them up.
The northwest ordinance an outlaw in the northwest territory
in which they made a confederation congress that is considered to be a legislative
act that was made and had bring importance because this protects the liberty of
the people and to be able to outlaw the slavery that is happening in the
northwest.