1. The boomtown losses it's economic power, and people migrate away from it to other places that they consider better for living, and thus leaving it as a ghost town. 2. After the main income of the boomtown is lost, people put their efforts into other things that can make them survive and keep the town alive, maybe a timber industry, fishing, agriculture, tourism.
"b. They opposed them by <span>charging that they were unconstitutional" is the best option since this group considered the acts to be a serious violation of their rights as citizens, even in times of war.</span>