De Grecia. (Is the answer. Es la respuesta.)
The pre-1890 expansion period in the US was marked by economic expansion (expansionism) fueled by, industrial growth, demand for fertile land, economic opportunities, and used economic policies after the closure of the revolutionary war while the post-1890 American expansion (19th C) was marked by imperialism, military expansion and formulation of policies to increase US powers, i.e. US signed a treat with China to gain diplomatic and trade relations resulting in the US taking over the Pacific ports.
Social areas such as relative aspects !!hope this helps
<span>Their owners formed corporations, oversaw complex processes, and sold much more goods.</span>
