A new project manager has been hired at a company that has suffered many project...

This question belongs to the Process domain because it focuses on requirements discovery, adaptive development, and selecting an approach that enables value delivery under uncertainty. PMI guidance on complex requirements recognizes that in many projects the needed functionality cannot be fully defined early, especially in complex or evolving environments. In such cases, iterative exploration and prototyping can help stakeholders better understand what they want and reduce costly misunderstandings later.

Option A only records a problem and does not help the customer clarify the need. Option B adds time and cost without improving understanding. Option C is better than A or B, but it still assumes that detailed requirements can simply be elicited up front even though the customer cannot articulate them clearly. Option D is the strongest answer because prototyping helps the customer visualize the functionality, provide feedback early, and shape the solution while value is being created. PMP-style reasoning favors adaptive techniques when requirements are unclear and rapid learning is needed. Therefore, a prototyping approach is the most effective response.