Ever since 1519, when the first arrival of Spanish
conquistadors took place, the region of Texas has been part of multiple
countries, such as Spain, France, Mexico, the Republic of Texas and the United
States of America. By 1836, the Texas Revolution comes to an end and the newly
formed Texas Republic gains its independence from Mexico. In 1845, the U.S.
Congress passes a bill authorizing the annexation of the Republic of Texas. In
October, the same year, the people of Texas adopt a new constitution through
public vote and on December 29, Texas becomes a legal part of the United States,
with the mention that the United States agrees to pay off its debts. The
correct answer is D, Mexico.
