Three towns are located as such: Town C is 3 miles directly west of Town a. Town B is two miles directly notherwest of Town C. The gas pipeline is to be made between towns A and B. Engineers have two alternatives. They can connect A and B directly, but then they should build pipeline through swamp. Alternatively, they can build pipeline fom Town A to Town C and then to Town B. Cost of construction through swamp from A to B is $125 000 per mile and cost to go throuh C is $100 000 per mile. Which alternative must engineers select to save money?