At one point in history, Texas was its own
O Planet
O City
O Nation
O Colony

colony

Explanation:

Native Americans have lived in Texas for thousands of years, but it did not become part of a country in the modern sense until Spanish explorers arrived in 1519. ... It became its own country, called the Republic of Texas, from 1836 until it agreed to join the United States in 1845.

b. sec, foreign relations

it provided for equal trade rights among nations in china.