This question belongs to the Process domain because it deals with risk response, issue handling, and controlled decision-making. PMI's PMP Examination Content Outline emphasizes that project managers should assess and manage risks, evaluate response options, and take actions that best support project outcomes. When a previously identified risk becomes an issue, the response plan is an important starting point, but PMP logic does not require blind adherence if a potentially better solution emerges. The project manager should first evaluate the new proposal with the team to determine whether it is truly more beneficial, feasible, and aligned with project constraints.
Option B is too rigid because project management requires judgment and adaptation when better alternatives are available. Option C is premature because the proposal should first be assessed before deciding whether formal change control is needed. Option D is too hasty because the new response has not yet been validated.
PMI-aligned practice supports reviewing alternatives thoughtfully, comparing impacts, and then selecting the most appropriate action. Therefore, the best response is to evaluate the team member's proposal before changing the planned response.