Answer and Explanation:
a. A historical similarity was the increase in the size of the USA. This promoted a larger and more imposing territory on the world stage, but it also presented disadvantages such as some problems in managing such a large territory and government spending, which were resolved over time.
b. A historical difference was that the Northwest Territory was obtained through a treaty with strictly political objectives, on the other hand, the acquisition of Louisiana was made through a purchase, which in addition to also having political objectives, imposing a federal expense.
c. One of the main differences is that Louisiana was sold by the French government, which encouraged a whole period of adaptation of the place to American culture and politics. On the other hand, the northwestern territory established a territorial difference due to the existence of civil freedom and freedom of blacks.
There were several major factors that led to stalemate in the trenches, but the best options from the list are "Defensive weapons were better than offensive ones.
<span>and Trenches were designed for defense."</span>
The answer is D because, that is the only answer that shows history in the light of great activity. B and C are irrelevant and A, means they were being controlled.