In order to combat Carville's rampant homeless problem, Mayor Bloomfield recently proposed a ban on sleeping outdoors in the city's many parks. He claims that such a measure will force the homeless to either leave Carville or to find means other than sleeping in public parks. Which of the following, if true, suggests that Mayor Bloomfield's plan will be successful? ['Adjacent cities have even tougher measures on the homeless sleeping outdoors.', "Many homeless tend to congregate underneath Carville's numerous overpasses.", "Until the ban, the city's many homeless shelters were at less than fifty percent occupancy.", "The percent of Carville's population that has been homeless has been slowly decreasing in the last five years."]