According to paragraph 4, how does competition affect evolution? A. It results in the evolution of physical structures that allow the species to compete with each other more effectively. B. It results in I the evolutionary extinction of all but one of the competing species. C. It results in the competing species evolving in such a way that they no longer compete for the same resources. D. It results in the competing species evolving to become so much like each other that competition between them eventually disappears.