According to the PMBOK® Guide, specifically the Collect Requirements and Develop Team processes, the project manager acts as a facilitator when the team faces technical ambiguity or " wicked problems " that lack clear solutions.

Facilitation and Brainstorming: When a team is " struggling to get traction " on a new problem, the Project Manager should utilize data-gathering techniques like Brainstorming. This creates a collaborative environment where diverse ideas can be surfaced without immediate judgment. It is the most effective way to jump-start the creative process and move from stagnation to action.

The Power of the Team: In both adaptive and predictive environments, the technical experts (the team) are best positioned to develop solutions. The PM’s role is not to provide the answer, but to provide the structure (the session) that allows the answer to emerge.

Divergent Thinking: Brainstorming encourages divergent thinking, which is essential when facing a problem the team has " never faced before. " Once a wide array of ideas is generated, the team can then use tools like Affinity Diagrams or Multicriteria Decision Analysis to narrow them down.

Analysis of other options:

Option A: While it is technically a risk, simply adding it to a Risk Register does nothing to solve the immediate problem of the team being stuck. Documentation is a secondary action to active problem-solving.

Option B: Adding it to the Issue Log tracks the problem but doesn ' t resolve it. The prompt asks what the PM should do next to get the team moving.

Option D: The Project Sponsor provides the " what " (the vision and funding) but generally should not be responsible for the " how " (the technical solution). Meeting with the sponsor for technical direction undermines the team ' s autonomy and expertise.

Per PMI standards, when a project hits a creative or technical roadblock, the project manager should immediately employ interpersonal and team skills to facilitate a Brainstorming session, empowering the team to innovate and find a path forward.