The correct answer is b. passing ex post facto laws.
Ex post facto laws are those that retroactively change the rules of evidence in a criminal case and increase the punishment of a crime that was legal when committed. This is a violation of Article 1 Section 10 clause 1 of the constitution
Homogeneous region is a region where the people are similar. The answer to your question will be whichever one mentions people being the same.
A. a system that allowed people to work in return for passage to america
It helps the king snake look more dangerous and helps it stay alive because other animals and humans might think it could kill them