Answer:
D. all of the above
Explanation:
assimilation is the process of taking individuals or social groups and absorbing them into mainstream culture. To do so with the Dawes Act, the Native Americans had to do all those things.
Trading helped people since it allowed people to not only provide and get things, it also allowed a spread of different innovations/ideas, inventions, and have more cultural diversity. For example, back then when the Colombian exchange happened, many different crops, cattle, etc were brought between the US and Europe. This allowed things that we now have today such as Florida being the main place for the citrus business (citrus came from Europe).