a state refusing to follow a federal law would be guilty of\nrefusing to amend the constitution.\nrefusing…

a state refusing to follow a federal law would be guilty of\nrefusing to amend the constitution.\nrefusing to ratify constitutional amendments.\nviolating the full faith and credit clause.\nviolating the supremacy clause.
Answer
Brief Explanations:
The Supremacy Clause in the U.S. Constitution establishes that federal laws are the supreme law of the land. A state refusing to follow a federal law goes against this clause. The other options are not relevant to a state - federal law conflict in this context.
Answer:
violating the Supremacy Clause.