The correct answer is C) American Indians taught the new immigrants how to survive in the new territories.
A positive effect of the westward expansion was that American Indians taught the new immigrants how to survive in the new territories.
In the 19th century, American white people moved into the West of the United States to settle in new territories. For that to happen, the Louisiana Purchase to France was the first step, followed by the manifested destiny and the Gold Rush in California.
Another positive effect of westward expansion for American Indians was new trade and economic opportunities.
