Age (years) and volume (cubic feet) information for a stand of trees growing in the Superior National Forest is given in the table below. Age Volume 10 1000.00 11 1070.00 12 1134.20 13 1190.91 14 1238.55 15 1275.70 If the USDA Forest Service uses a 3% discount rate, at what age should the stand be harvested? Select one: O a. 10 years O b. 11 years Oc. 12 years Od 13 years O e 14 years Of. 15 years