Frequent feedback is key to agile success. According to thePMI Agile Practice Guide (Section 5.3: Sprint Review and Feedback)andMike Griffiths' PMI-ACP Exam Prep Book (Chapter 4: Stakeholder Engagement), thesprint review (demo)is the primary event designed to obtain feedback from stakeholders. If stakeholders are unresponsive,increasing the opportunities for engagement, such as byscheduling more demos or review checkpoints, encourages their involvement. * Option Dis correct: demos provide structured opportunities to collect feedback. * Option Amight increase delivery cadence but doesn't guarantee feedback. * Option Bis inappropriate-daily stand-ups are for the team. * Option Cviolates role responsibilities-estimation is owned by the team, not stakeholders.