Which scenario is avoided because the constitution contains the supremacy clause

a- one branch of government becomes more powerful then others

b- the federal government amends the constitutions expand citizenship rights to a new group

c-it becomes unclear whether transportation is the responsibility of federal government or a state govern

d- a state passes a law that contradicts the nineteenth amendment

The correct answer is D) a state passes a law that contradicts the nineteenth amendment.

The scenario that is avoided because the Constitution contains the supremacy clause is "a state passes a law that contradicts the nineteenth amendment."

You can find the supreme clause in Article VI, clause 2, of the United States Constitution. In simple terms, it says that the laws that appear in the Constitution are the supreme law of the nation. So federal laws take priority when conflicting with any state laws. In a few words, when in conflict, federal laws remain. That is why the scenario that is avoided because the Constitution contains the supremacy clause is "a state passes a law that contradicts the nineteenth amendment."