3.) the formation of the independent United States.
not 1 because civil was was 1861-1865.
not 2 because Andrew jackson was elected in 1829.
Westward expansion started early 1800s.
Answer:
The correct answer is "D": The westward expansion of Unites States.
Explanation:
When liberating itself from the British mercantilist oppression, the new independent nation is launched towards the conquest of the west, expanding economically and territorially. As a result, the industry developed greatly giving rise to the conformation of the great power that it is today.
