Paragraph 6 supports which of the following statements about the factors that are essential for the survival of a species? A. The most important factor for the survival of a species is its ability to compete and adapt to gradual changes in its environment. B. The ability of a species to compete and adapt to a gradually changing environment is not the only ability that is essential for survival. C. Since most extinctions of species are due to major meteorite impacts, the ability to survive such impacts is the most important factor for the survival of a species. D. The factors that are most important for the survival of a species vary significantly from one species to another.