Prof Reck believes in using the Coefficient of Variation to evaluate risk-adjusted returns. Which of these companies would he consider to be the WORST investment? John Co: Expected Rate of Return 10% and Standard Deviation 12% Paul Inc: Expected Rate of Return 28% and Standard Deviation 18% George Group: Expected Rate of Return 5% and Standard Deviation 10% Ringo Corp: Expected Rate of Return 12% and Standard Deviation 12% A. John Co B. Paul Inc . George Group D. Ringo Corp