Final answer:
A federal statute is the type of statutory law that applies to all of the states in the U.S., taking precedence over state or local laws due to the supremacy clause in the Constitution. The correct answer is option: a) a federal statute.
Step-by-step explanation:
The type of statutory law that would apply to all of the states is a federal statute. The hierarchy of laws in the United States positions the United States Constitution at the top, followed by acts of Congress and treaties, which are federal laws and thus applicable throughout the nation.
Below federal law come state constitutions, state laws or statutes, and then city and county ordinances. Federal statutes override any state or local laws due to the supremacy clause in the Constitution, which declares that the Constitution, federal laws made pursuant to it, and treaties made under its authority, constitute the supreme law of the land.
Local ordinances and zoning laws only apply within the jurisdictional boundaries of a city or county. A state statute would only be relevant within the particular state that enacted it.