Answer:
(A) displacement
Explanation:
Displacement as a defense mechanism is a way of reducing the generated anxiety and restoring emotional balance. Thus unconsciously the extreme reaction to the kids helps softening the frustration experienced at work.
Displacement is a defense mechanism where negative emotions that were created to her with the boss and coworkers will be transferred from this original setting to the less threatening persons : the kids. Little do they owe for the situation but since the kids cannot pose any threat ,displacing this anger towards her children will at least relief her.
In other words a direct confrontation with the boss would pose a higher threat like being fired, thus displacement will take place.