What was a direct result of the increasing popular belief in America's manifest destiny? It led to an isolationist policy that separated the United States from other countries.
It led to the addition of Texas and other lands to the United States.
It caused the United States to fight for control of other countries.
It caused a universal desire for more slave states in the West.

Option: It led to the addition of Texas and other lands to the United States.

Explanation:

The motive behind the expansion into Texas and Oregon was the Manifest destiny. The main goal was to increase its white American settlers in the westward region. The manifest destiny allowed American settlers to move and expand across its borders to the Pacific Ocean and beyond to spread their traditions and their institutions. Before the American Civil War, the idea of Manifest Destiny used in acquiring Texas, New Mexico, Oregon, and California.

sorry i really dont know