Answer:
-technological advance like Steam powered riverboats
-means to control disease
-they were no longer confined to the coast
Ballistic Missiles were not invented until 1936 so the answer is A
Answer:
The Mississippians were a native American culture that inhabited the Mississipi River Valley and surrounding areas from 9th till 16th century. Their culture was unique in that they created Mounds, that is man-made hills, many of them are still existing today.
