The American attitude shifted in favor of rights for Native Americans. This is based on "Polls showed that Americans believed in rights for Native Americans". Why it's not B is because it wasn't the polling that contributed to the act, but what the polls showed which is C.
According to the Supremacy Clause of Article 6 in the United States Constitution, if a state law goes against the Constitution, then the state law would be overturned and made null and void. All the laws that are passed by the Federal government would be treated as Supreme law of the land. It is globally accepted in the United States that the Constitution is the ultimate and supreme in regards to the laws of the land. The laws made by the federal Government would be treated as supreme unless it violates the rules laid down by the Constitution of United States. The United Supreme Court has the power to decide if the law is in violation of the Constitution or not.
Gulf Coast is the place that will be affected by Ice Wedging.
Explanation:
Gulf coast faces an important issue that will undermine its status as the oil conglomerate in the US.
This is due to the ice welding further up north that has been responsible for global warming, greenhouse effect and ultimately rising sea levels that is a very real issue that pertains to Texas.
Most of the coastline has rich oil resources and is responsible for most of the trade and it stands a chance of being submerged any time now.
This would mean a drastic fall of economy and displacement of the people.