After purchasing the Louisiana Territory, the United States proceeded to A . explore the vast region
B . Invade Mexico and Florida
C . Build factories in the region
D . Establish settlements in Kentucky

PLEASE HURRY !

Option: A . explore the vast region.

Explanation:

After purchasing the territory, Thomas Jefferson sends Lewis and Clark for an expedition. The most significant accomplishment of the Lewis and Clark expedition was building the relationship with the Native Indian in the west of Mississippi River. The expedition helped in establishing the right of the United States in the region. The expedition made helped in discovering new plants and animals.

the russian revolution of 1917 involved the collapse of an empire under tsar nicholas ii and the rise of marxian socialism under lenin and his bolsheviks.