Which statement about exceptions and demo encouragement is true?

• A. Demo is optional but encouraged even with an exception
• B. Demo is strictly required if an exception exists
• C. Demo is never allowed with exceptions
• D. Demo is discouraged with exceptions

Answer: (A)

The main idea here is how an exception affects whether you should perform a demo: even when an exception is present, doing a demonstration is still a helpful, recommended step. Demonstrations verify how the exception changes the normal behavior and help ensure everyone understands the outcome, so labeling demo as optional but encouraged captures the right balance between flexibility and best practice. It acknowledges you may sometimes skip a demo for practical reasons, but the default guidance is to do one when possible to maintain clarity and consistency.

The other statements lean too rigidly in one direction or remove a useful check. Requiring a demo strictly whenever an exception exists ignores real-world constraints and isn’t necessary to validate the exception. Saying a demo is never allowed with exceptions or that it’s discouraged removes a valuable verification step and reduces transparency about how the exception affects the process.