This shows Margaret's inability to <u><em>conservation</em></u>.
Explanation:
In the field of psychology, conservation can be described as the thinking of the person that a certain quantity of something will remain the same even if adjustments in the size or shape are made.
The same phenomenon of conservation was observed in Margaret because she believed that her candy will be lesser than Leslie's even though Leslie had made an adjustment in the size and shape of her candy.
Answer: d. Josh, who has just been told he has cancer and whose wife announces she is leaving him when he tells her announces she is leaving him when he tells her the news