Final answer:
The correct defense mechanism displayed when avoiding Dairy Queen but consuming frozen yogurt at home is Displacement, where the individual redirects their desires onto a safer substitute.
Step-by-step explanation:
The question refers to psychological defense mechanisms, which are unconscious processes our minds employ to protect ourselves from anxiety and to maintain self-image. In the scenario where someone avoids Dairy Queen but consumes a large amount of frozen yogurt at home, the correct answer is D) Displacement. This is because the individual is displacing their impulse from a specific target (Dairy Queen) onto another less threatening substitute (frozen yogurt at home).
It's important not to confuse this with Sublimation, which is a more positive defense mechanism where socially unacceptable impulses are unconsciously transformed into socially acceptable actions or behavior.