Gina is an ecologist, She is studying damage to tree bark in a forest. Initial research suggests that a new animal species that’s entered the area caused the damage. So, Gina draws a model to show her colleagues what’s happening. Further research suggests that the animal has carried a bacteria that has infected the trees, causing the damage. What are the limitations of Gina’s model? A. It doesn’t take all factors into account. B. It isn’t drawn to scale. C. It’s a mathematical model, not a conceptual model. D. It needs to be a physical model, not a conceptual model