Which option explains how Texas was admitted into the United States?

A. Texas joined the United States directly following the defeat of Texan troops at the Alamo.

B. Texas was part of the lands the United States acquired in the Treaty of Guadalupe Hidalgo.

C. The United States annexed Texas, which had been an independent republic.

D. The United States won the territory from Mexico following the Mexican-American War.

he leadership of both major U. S. political parties, the Democrats and the Whigs, opposed the introduction of Texas, a vast slave-holding region, into the volatile political climate of the pro - and anti-slavery sectional controversies in Congress. Moreover, they wished to avoid a war with Mexico, whose government refused to acknowledge the sovereignty of its rebellious northern province. With Texas's economic fortunes declining by the early 1840s, the President of the Texas Republic, Sam Houston, arranged talks with Mexico to explore the possibility of securing official recognition of independence, with the United Kingdom mediating.

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D. The United States won the territory from Mexico following the Mexican-American War.

Explanation:

Mexico controlled the region until 1836 when Texas won its independence, turning into an autonomous Republic. In 1845 it joined the United States as the 28th state. The state's addition set off a chain of events that caused the Mexican-American War in 1846.