Exam Certified Sharing and Visibility Designer topic 1 question 49 discussion

I thought so too, but I asked ChatGPT to pick between B/D, and here is what it said: "Custom objects often have more complex and varied relationships and access patterns compared to standard objects like Cases. The impact of having a large number of custom objects related to an Account can be significant in terms of sharing calculations and record access times. Cases, being a standard Salesforce object, are typically optimized for performance in large volumes. Salesforce's standard objects often have built-in optimizations for handling large data volumes and relationships. While both scenarios could potentially impact performance, the complexity and variability of custom object relationships usually present a greater challenge and opportunity for optimization."