Constrained optimization methods of project selection include: a. scoring models. b. benefit-cost ratios. c. multi-objective programming algorithms. d. subjective analysis. bbashir (6Â¼years ago): The correct answer is b. benefit-cost ratios. benefit-cost ratio is one of the project selection method. C.These are complex mathematical formulas and algorithms that are used to predict the success of projects, the variables within projects, and the tendencies to move forward with selected project investments.