Answer:
C
Step-by-step explanation:
C is the correct answer. When we have model A (for example) it could have 3 things from the most recent experiment. however, if another experiment is done, a new model must be made because we now do not have 3, but have 4 things that the model must show. from what we see, the said most recent model is not showing this. that is why it needs to be updated, because new discoveries makes the current model inaccurate.