Why does the author believe that the Mandans were skilled farmers? A. They could grow crops despite adverse weather. B. They could grow crops in most types of soil. C. They developed ne
Why does the author believe that the Mandans were skilled farmers?
A. They could grow crops despite adverse weather.
B. They could grow crops in most types of soil.
C. They developed new varieties of corn.
D. They developed effective fertilizers.