Respuesta :
Answer:
1)A
2)D
Explanation:
Westward expansion, the 19th-century movement of settlers into the ... by the Gold Rush, the Oregon Trail and a belief in "manifest destiny. ... The Louisiana Purchase stretched from the Mississippi River to the ... is one of the defining themes of 19th-century American history, but it is .... California Gold Rush.
Answer:
The Answer to number 1 is improved methods and systems of transportation