The goal of reforesting degraded land is to create an area with a multitude of thriving tree species. But some experienced land managers use a reforesting strategy that involves planting a single fast-growing tree species. Which one of the following, if true, most helps to resolve the apparent discrepancy in the information above? ['The process of reforesting degraded sites is time consuming and labor intensive.', 'The growth of trees attracts wildlife whose activities contribute to the dispersal of a large variety of tree seeds from surrounding areas.', 'Tree species that require abundant sunlight tend to grow quickly on degraded land.', 'The reforestation of degraded land is generally unsuccessful unless the land is planted with tree species that are native to the area designated for reforestation.']