2.5 feet is half of 5 feet meaning we know that 2.5 feet is gonna be equal to half of two inches. So we need the answer that gives us one. 2/2.5 = 0.8 and 0.8/5 = 0.4. This means the answer is not A as it is too small. 5/2.5 = 2 and 2/2 = 1 meaning that it must be b. Therefore it cannot be c cause its already b.