Final answer:
It is often advisable to discuss the adoption of Scrum with customers because it might change the delivery method and impact client expectations and project nature.
Step-by-step explanation:
Discussing the adoption of Scrum with customers depends on the context of the project and the existing relationship with the clients. In some instances, it could be seen as a professional courtesy to inform and discuss the change in project methodology because it does indeed change the delivery method. Scrum might alter the timelines, deliverables, and communication processes. Therefore, it would be correct to select option 3) Yes, because it changes their delivery method. The choice to use Scrum should not be made in a vacuum without considering client expectations and the nature of the project.