Agile and adaptive approaches prioritize delivering value continuously and focusing on customer needs. When an enhancement is requested during a demo, the project manager should evaluate whether the change aligns with the project's value goals and, if so, integrate it into future iterations if feasible.

According to the Agile Practice Guide and PMBOK® Guide – Seventh Edition, project teams should support value-based delivery and adapt plans to prioritize high-value features when appropriate.

Option A and D focus too early on cost without considering value alignment.

Option C may be valid in a predictive project, but in Agile, the backlog is typically reprioritized instead of triggering formal change control processes.