Scientists struggled with classifying red pandas and giant pandas because they have physical similarities to both raccoons and bears. How has the availability of DNA evidence affected the evolutionary classification of organisms such as the pandas? A. Organisms with the most shared derived genetic characters are considered the most closely related. B. Organisms with the most shared derived genetic characters are classified in the most clades. C. Derived genetic characters can be used to identify evolutionary relationships, but only if organisms have some shared physical characteristics. D. DNA analysis has confirmed species classifications based on derived physical characters, but no new classifications have been suggested.