Final answer:
D. The Louisiana territory gave elbow room to settlers.
Step-by-step explanation:
The correct answer is d) the Louisiana territory gave elbow room to settlers.
The Louisiana Purchase, which occurred in 1803, was a significant event in American history. It involved the purchase of a large land area, known as the Louisiana Territory, from France by the United States.
The purchase was made by President Thomas Jefferson and it helped to double the size of the country. The Louisiana Purchase provided the United States with important strategic and economic benefits by giving it control over the Mississippi River and access to the interior of the continent.