Final answer:
Plants A and C, with the same coordinates (-9, -9), are the closest to each other, making option C) C and A the correct answer.
Step-by-step explanation:
The question pertains to identifying which of the three plants George planted are nearest to each other. Given the coordinates of plants A (-9, -9), B (-9,-2), and C (-9, -9), it is clear that plants A and C are positioned at the same point, thus making them the closest to each other. It is important to note here that having identical coordinates implies that there is no distance between these two points, indicating that either there has been a mistake with one plant's coordinates or that A and C are indeed the same plant.
Therefore, the correct answer to the question 'Which plants are planted nearby?' would be option C) C and A, as they have the same coordinates and are therefore located at the exact same point.