This depends on if a refers to the current government.
If it is, then the answer is D. none of the above
However, the articles of confederation, america's first government, was the first thing that Americans did after the war, so the answer could also be A
Answer:
The victory at Yorktown was among the most significant battles of the American Revolution because it concluded the war and the colonists came out victorious.
army is a group of people fighting for something or someone.