Meeting milestones without delivering a quality product undermines the project's objectives. The PMBOK® Guide – Seventh Edition emphasizes delivery of value and quality as key aspects of project performance. When quality issues emerge, the project manager should collaborate with the team to identify gaps between expected and actual outcomes and take corrective action.

Option B is correct because it addresses the root cause—quality gaps—and aligns outcomes with stakeholder expectations.

Option A assumes a time extension is needed before evaluating the actual gap.

Option C disregards quality, which is a key component of the project constraints (scope, time, cost, quality).

Option D is reactive and ad hoc; reprioritization should follow analysis of root causes.