An ecologist observed that five similar species of warblers coexisted on spruce trees. The warblers were essentially foraging on the same foods in different parts of the tree canopy. If character displacement occurs, then you would expect to observe that Multiple choice question. A) each of the warblers will start to feed on different kinds of insects. B) the different groups of warblers will develop different mating songs. C) the warblers will gradually develop different physical traits. D) each of the groups of warblers will become a generalist in order to obtain enough food.