Texas is the only state to enter the united states that was admitted by a treaty over annexation. why did texas seek to gain independence from mexico? a) texas sought independence from mexico to increase protection from hostile latin american nations. b) texas sought to gain independence from mexico, due to the prosperity the united states was enjoying at the time. c) texas sought to gain independence from mexico, due to mexico's government changing from a democracy to a dictatorship. d) texas sought independence from mexico to enjoy greater political rewards such as tax breaks and the opportunity for better trade.