In Which Case Does Meddlesome Preferences Interfere with Standard Economic

In which case does meddlesome preferences interfere with standard economic reasoning?

A) In a poor economy, the diet is very low in protein, and plenty of stray dogs abound. Sellers realize that dog meat would be profitable and deliver the protein needs of the people, but don't sell it because the animal rights society issued a ban against eating dogs.
B) Thousands of people are on the wait list for kidneys. However, the government does not allow the sale of kidneys even though people can survive very well with one kidney.
C) In poor countries, workers between the ages of 13 to 16 bring much-needed income to households. However, due to child labor laws in the richer countries, export industries in poor countries cannot hire these workers, leading to the poor getting poorer.
D) Each of these cases provides an example of meddlesome preferences.