The correct option would be D.
Four incidents arousing anti-Spain sentiment in the United States:<span>the explosion of the Maine
anti-Spain newspaper stories
distribution of propaganda against Spain
a letter from the Spanish ambassador</span>
6.) Bartolomé de las Casas
9.) Ecomienda?? Not sure on this one, though that wasn't for Native Americans.
10.) Cahokia!!
3.) Thomas Morton (Had to look this up. http://che.umbc.edu/londontown/docs/NativeAmericansintheChesapeake.pdf BOTTOM)
I don't know any other ones, hope I helped to a certain extent.
Answer:
I don't understand that language
They built 11 mounds at Spiro near the Arkansas River.