D is an example of constructive criticism. The person recognizes the fact that the color of the hat is nice, but that child can improve by pasting the hat correctly.
D. "Your hat is colored nicely, but you didn't paste it together correctly. Look at Sally's hat. Can you paste it together in the same manner."
Explanation:
This is an example of constructive criticism. In this example, the teacher starts by giving a compliment to the child and recognizing what he did well. This sets a positive tone for the rest of the exchange. Afterwards, the teacher highlights the main object of criticism, but at the same time explains what the right way is. Finally, the teacher involves another student, which leads to cooperation.