Imagine a different system in which toads had a wide range of variation in color. In some ponds, most of the toads are light in color. In other ponds, the average color is fairly dark. From the options below, select which represent TESTABLE hypotheses that could explain this difference in coloration. A. A predator that is present in some ponds prefers one color to the other. B. Female toads in some ponds prefer darker toads, while females in another pond prefer lighter toads. C. Toad color is determined by food quality, which varies pond to pond. D. Toads can change their color, based on their stress level.