Hummingbird bill length data was collected and graphed in a particular environment. based on the data collected, which is the best conclusion drawn? a) the environment is selecting against all longer bill length birds. b) due to natural selection, a virus has killed off all medium bill length birds. c) the environment has a greater amount of long nectar tubed flowers and short nectar tubed flowers causing disruptive selection in medium bill length birds. d) the environment has a greater amount of long nectar tubed flowers and short nectar tubed flowers causing stabilizing selection in medium bill length birds.