Final answer:
D) Displacement
The scenario illustrates the defense mechanism of displacement, where one transfers inappropriate feelings onto a less threatening target.
Step-by-step explanation:
The statement, "You drive by the Dairy Queen and say, 'Look at all those weaklings eating sundaes,'" represents the defense mechanism of displacement.
Displacement involves transferring inappropriate urges or behaviors onto a more acceptable or less threatening target. In this case, the speaker may have their own desires or feelings about eating such treats and views them as a weakness.
Instead of acknowledging their own feelings, they project these feelings onto others, criticizing them to avoid facing their own desires or sense of self.