Assume large-company stocks returned 12.1 percent on average over the past 88 years The risk premium on these stocks was 8 6 percent and the inflation rate was 3.0 percent What was the average nominal risk-free rate of return for those 88 years'? A. 3.5 percent B. 9.1 percent C. 4.6 percent D. .5 percent E. 6.5 percent