The correct answer is c. Rosa Parks~
Tension between Anglo-American settlers and the Mexican government can be traced back to the 1820's, when the Fredonian Rebellion and disagreements about slavery took place.
However, one of the early turning points was the law of April 6, 1830, which encouraged Mexican and European families to migrate to Texas, while stopping immigration from the United States. Taxes to all foreign goods were also added.
New military forts were built to make sure the law was being followed, but Mexican officers never trusted the Anglo American settlers, who were in turn upset by the new law. U.S. officers, on the other hand, did not cooperate to stop American immigrants.
Eventually, the ban could not be enforced and their relationship worsened.
The Warring States Period (475–221 BC) was a period of division and conflict in ancient China. After the fairly peaceful and philosophical Spring and Autumn Period, various states were in conflict before the Qin state conquered them and reunified China under the Qin Dynasty.