The market for fresh, locally grown apricots has grown in recent years as awareness of the health benefits of eating fresh fruit has increased. Peach production has decreased dramatically over the last several years. Fresh, locally grown apricots sell at a much higher price than do fresh, locally grown peaches. It costs as much to water and fertilize peach trees as it does to water and fertilize apricot trees.
Planting peach trees on their farm makes more sense for the Johnsons than planting apricot trees. Although fresh, locally grown apricots are very popular in this area, the same is true of peaches. However, individual peach trees cost much less to purchase and plant than do apricot trees, and peach trees also begin bearing fruit at a much younger age.
Which one of the following, if true, would most seriously weaken the argument?