I need help with this... Please Help!!!?

The Arizona legislature passes a law allowing Mexican immigrants to enter the United
States freely and establish residency, directly contravening federal law. After the governor
signs the law, what would likely happen next?



the answer choices....


A. Courts in other states would use the law as precedent when deciding cases involving
Mexican immigration.
B. Federal district courts in Arizona would be obliged to decide cases based on the new
law.
C. The law would be invalidated based on the preemption doctrine.
D. The law would have to be upheld by the Supreme Court before it could be enforced.

This is any easy one. When examining any quesiton regarding conflicting legislation between two state actors do the following:
1) identify the parties (in this case the state legislature and the Congress of the U.S.)
2) identify where their power derives from (for the state legislature it would be from their police powers (which means the ability to legislate on matters of health, safety, welfare, and asthetics) versus the federal power of Congress to regulate and control the admission requirements for aliens which is a plenary power of congress that is set out expressly in the Constitution.
3) Consider the hierarchy of authority ( and in this case the federal Constitution trumps any individual states legislature under the Supremacy clause)

Therefore, the law should be considered invalid as offensive to the federal Constitution and should be adjudicated as such.

The power of Congress 鈥渢o exclude aliens from the United States and to prescribe the terms and conditions on which they come in鈥?is absolute, being an attribute of the United States as a sovereign nation. 鈥淭hat the government of the United States, through the action of the legislative department, can exclude aliens from its territory is a proposition which we do not think open to controversy. Jurisdiction over its own territory to that extent is an incident of every independent nation."

However, give greater specificity in exactly what the law in Arizona says would help me answer more specifically.