Which one of the following statements is false? a. Wage-risk analysis can be used to estimate the value of a statistical life. b. Economic studies have concluded that the social rate of time preference is currently around 5%. c. One method used to determine the discount rate is the rate of return on low-risk investments. d. The social rate of time preference will increase if the annual growth rate of consumption increases. e. Economists adjust estimates for inflation by presenting results in real dollars