Assume That Large-Company Stocks Had an Average Return of 12

Assume that large-company stocks had an average return of 12.1 percent and a standard deviation of 19.6 percent for a 40-year period.What range of returns would you expect to see on these stocks 95 percent of the time?

A) -30.3 percent to 53.2 percent
B) -30.3 percent to 73.9 percent
C) -30.3 percent to 64.1 percent
D) -27.1 percent to 53.2 percent
E) -27.1 percent to 51.3 percent