Presented below is selected information for three regional divisions of Medina Company Contribution margin Controllable margin Average operating assets Minimum rate of return North $300,300 $140,000 $1,000,000 11 % Divisions West $500,100 $361,100 $1.570,000 15 % South $399,300 $208,600 $1,490,000 996 Assume that each division has an investment opportunity that would provide a rate of return of 16%. Serformance, which division or divisions will probably make the additional investment? to measure performance, which division or divisions will probably make the additional investment