The lengths of brook trout caught in a certain Colorado stream are normally distributed with a mean of 14 inches and a standard deviation of 3 inches. What lower limit should the State Game Commission set on length if it is desired that 80 percent of the catch may be kept by fishers?
a. 12.80 inches
b. 11.48 inches
c. 12.00 inches
d. 9.22 inches