Final answer:
The correct answer for where to treat German Cockroaches is D. All of the above, which includes cabinets, corners, and crevices to effectively manage and eliminate an infestation.
Step-by-step explanation:
When treating for German Cockroaches, it is important to target areas where they are most likely to hide and breed. This includes A. Cabinets, B. Corners, and C. Crevices. Therefore, the correct answer is D. All of the above. These areas provide the shelter and proximity to food and moisture that cockroaches need to thrive. It is essential to treat all these areas with appropriate pest control methods to effectively manage and eliminate a German Cockroach infestation.