People along the route of the Underground railroad would held runaway slaves by offering discrete food and shelter on their way to free states. They would often to this a great risk to their own safety.
The correct answer for the question that is being presented above is this one: "wooden shutters." Instead of transparent glass windows in the Johnson Building, Wright used wooden shutters. He used an alternative like wooden shutters<span>
</span>
Your answer is B. A charter! :)
Answer is the Protectorate