Paramecia are predators that feed on smaller protists. In an experiment, two varieties of Paramecia caudatum were grown separately in culture. Their growth rates can be seen in graphs a and b. Then, the species, one large and one small, were combined into one culture tank. The growth of the combined P. caudatum varieties can be seen in graph c. Use the recorded data to explain how this experiment exemplifies natural selection. Choose ALL that help with your explanation.