C) Texas sought to gain independence from Mexico, due to Mexico's government changing from a democracy to a dictatorship.
Texas saw the laws in Mexico as arbitrary and tyrannic in many ways. It reminded them of how British used to treat the colonies, maybe worse. They did not want to follow the rules of Mexico.
Rome is in the middle of Italy. Italy is the Mediterranean country found in the southern middle part of Europe and looks like a boot.
They came on a agreement by voting, in some cases each state would get one vote and it would go from there.
Hoped this helped =)
The term used for the series of conflicts in the 1800s is the Indian Wars.