The owner of a greenhouse and nursery is considering whether to spend $12,000 to acquire the licensing rights to grow a new variety of rose bush, which she could then sell for $8 each. If her available land has design and effective capacities of 3,000 and 2,000 rose bushes per year respectively, and she plans to grow 1,200 rosebushes each year on this land, what will be the efficiency of her use of this land? 0% 67% 60% 40%