Final answer:
User-Defined Exception Classes are invaluable for handling specific errors in an application's logic, offering better user error messages, and providing detailed control over error management, encompassing all mentioned reasons.
Step-by-step explanation:
User-Defined Exception Classes are most handy in several situations. They are particularly useful:
- A. To handle errors that are specific to the application being developed.
- B. To provide more specific error messages to users.
- C. To allow for more granular control over how errors are handled.
- D. All of the above.
Using User-Defined Exceptions allows developers to create custom exception classes that can capture and express unique error conditions which are particular to an application's logic. This specificity can enable more readable code and allow for tailored responses when exceptional situations occur, helping both the users and the maintenance of the codebase.