After being reprimanded by his boss, Jay goes home and yells at his children, even though they did everything that he asked them to do. Jay's behavior BEST illustrates which defense mechanism

The answer is displacement.

Explanation:

Under this mechanism, people direct their emotions to an object or person that didn't provoke their reaction in the first place. This way we can satisfy our impulse without the negative consequences.

Being angry at a child is a perfect example of displacement. Most of the times this reaction is unconscious.