The following economy produces two products.) Production Possibilities Table Product A B C D E F Submarines 0 1 2 3 4 5 Wheaties 100 90 75 55 30 0 Refer to the above table. A change from possibility E to F means that: opportunity costs are linear. 1 additional submarine means you have to forego 30 wheaties. opportunity costs are increasing. 1 unit of submarines is given up to get 30 units of wheaties