Describe the concept of Manifest Destiny and its effects. How did it affect territory expansion?

"The phrase "manifest destiny" is most often associated with the territorial expansion of the United States from 1812 to 1860. ... During this time, the United States expanded to the Pacific Ocean—"from sea to shining sea"—largely defining the borders of the contiguous United States as they are today."

Explanation:

b. major john c. frémont led a rebellion called the bear flag revolt.

explanation:

during the bear flag revolt, from june to july 1846, a small group of american settlers in california rebelled against the mexican government and proclaimed california an independent republic. the republic was short-lived because soon after the bear flag was raised, the u.s. military began occupying california, which went on to join the union in 1850. the bear flag became the official state flag in 1911.

the answer is prolly b