This is a People domain question because it deals with communication, team dynamics, leadership, and concern resolution. PMI's PMP Examination Content Outline stresses that project leaders should support team performance, address and remove impediments, and use leadership approaches that help teams function effectively. Daily standups are intended to promote transparency and surface issues quickly, but when one individual repeatedly raises doubts, the project manager should first understand the underlying concern in a focused discussion rather than letting the standup become a prolonged debate.
Option A is not the best first step because daily standups are meant to be short and coordination-focused, not deep problem-solving sessions. Option B is premature because the project manager has not yet diagnosed the real issue. Option D is too escalatory for an initial team-level concern. The strongest PMI-aligned first action is to meet privately with the individual to understand the concern, assess whether the risk response strategy has a valid gap, and then determine the proper action. This reflects servant leadership, active listening, and issue resolution at the lowest appropriate level before escalation.