In what year was the "Monroe Doctrine" issued?

a 1813

b 1823

c 1848

d 1858

B

Explanation:

The Monroe Doctrine was issued on December 2nd, 1823. The President of the United States at the time, James Monroe, hoped this would keep European nations from interfering and establishing colonies in the Western Hemisphere.

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

i think the answer is b.