Let model 1 be the current model, and let model 2 be the model where all product requirements have been increased by 20%. Which of the following is true about the optimal solutions to these two models? Click here to reference the data needed to answer the question. a. The same product requirement constraints are binding in both optimal solutions. b. The optimal total cost is more than 20% larger in model 2 than in model 1. c. The same input availability constraints are binding in both optimal solutions. d. None of these choices are true.