According to this map, the oregon territory
a) was acquired from britain.
b) remained in foreign control.
c) was purchased because of the mexican war.
eliminate
d) was part of the texas annexation of 1846.

It is A.) Was accquired from Britain. Britain had the James Cook exploration of the Columbia River.  In 1846 they both made a Treaty to cede the territory to the U.S. The U.S. had the C and L( Clark and Lewis) exploration in 1804.

Brainliest Plz??

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.