Which scenario is avoided because the constitution contains the supremacy clause?

a. the federal government amends the constitution to expand citizenship rights to a new group.
b. one branch of government becomes more powerful than the others.
c. it becomes unclear whether transportation is the responsibility of the federal government or a state government.
d. a state passes a law that contradicts the nineteenth amendment.

It is letter D. The supremacy clause condition is the most critical underwriter of national union. It guarantees that the Constitution and government laws and arrangements overshadow state law and ties all judges to cling to that standard in their courts. The supremacy clause is the area of the Constitution expressing that the Constitution and government laws made in promotion of the Constitution are the incomparable traditions that must be adhered to. The supremacy clause likewise implies that states can't manage, meddle with, or control government issues.