Which of the following is an example of constructive criticism?
a. "making a paper hat isn't difficult. just take your time and it will turn out fine."
b. "the paper hat you made looks different than everyone else's. why is that "
c. "are you having a problem making your paper hat? why don't you ask sam to you."
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 "

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.

throughout history, economists have always thought  ..