when was a state obligated to follow the constitution?\no after all the states had ratified it\no after that…

when was a state obligated to follow the constitution?\no after all the states had ratified it\no after that state had ratified it\no after a majority of states had ratified it\no as soon as it was written
Answer
Brief Explanations:
Once a state ratified the Constitution, it was bound by its provisions. Ratification is the formal act of giving approval. Each state's ratification made it obligated to follow the Constitution.
Answer:
after that state had ratified it