Answer:
A. Show gradual increases over time
Explanation:
The answer is
A. Show gradual increases over time
Madeleine's IQ score will gradually increased as now after she was adopted be a couple, she is slowly and gradually introduced to books and educational games. The parents also provide lively conversation to Madeleine. She is active and is learning things. This is also exploring museums and zoos and learning a lot from them. All this will increase the level of her IQ gradually by time progresses.
Thus the answer is ---
A. Show gradual increases over time