A Developer had an issue with no hardware to test the software.

The Scrum Master is aservant leader, focused on enabling the Scrum Team to work effectively. By taking action to resolve the Developer's impediment (lack of hardware), the Scrum Masterdemonstratesleadershipby facilitating the team’s progress and ensuring they can meet the Sprint Goal.

According to the2020 Scrum Guide, the Scrum Master serves the Scrum Team by:

Removing Impediments: Resolving obstacles that block the team’s progress is a key responsibility of the Scrum Master.

Supporting Team Effectiveness: By addressing issues outside the team’s control, the Scrum Master ensures that the Developers can focus on their work.

Why the other options are incorrect:

A. Disciplinarian:A Scrum Master does not enforce rules or discipline team members. They lead by fostering collaboration and resolving issues, not by control.

B. Project Manager:Scrum Masters do not perform traditional project management tasks like resource allocation or task assignment. Their role is to serve and support the team rather than manage it.

C. Authoritarian:The Scrum Master is not an authoritarian leader. Their approach is grounded in servant leadership, enabling and empowering the team rather than commanding it.