Why did Texas settlers not think of themselves as Mexican

The land was cheap, so many Americans settled in Texas. Mexico tried to stop them, but they still came. Slavery was against Mexican law, but Americans brought slaves to Texas. Many American settlers and Tejanos, or Mexicans who lived in Texas, wanted to break away from Mexico. They did not like laws made by Santa Anna, Mexico’s president. The Tejanos and Texans decided to fight for independence.

Ithink the answer is b : )