Answer:
The correct answer is letter "D": Class envy.
Explanation:
In behavioral economics, the endowment effect explains why an individual could give a higher value to an object that posses than giving a low value when the individual does not have it. The approach implies the object has symbolic importance for the individual while having it.
A good example of the endowment effect refers to a teacher that gives one of his classes' students mugs as gifts. The value of the students who received mugs was higher than the value of those who did not get one.