The programme is in the ‘deliver the capabilities’ process in Tranche 3.

Comprehensive and Detailed 200 to 250 words of Explanation From Exact Extract of project-programme-and-portfolio-management of 5th Edition MSP:

The Justification Theme in MSP 5th Edition is concerned with the ongoing viability of the programme and the realization of the benefits that justify the investment. A critical aspect of this theme is the monitoring of the Benefit Realization Plan. If events occur that threaten the timing or magnitude of benefits, it directly impacts the programme's justification.

In this scenario, the failure of engineering staff to attend training is not just a scheduling issue; it is a threat to the realization of reduced costs. Option C is the correct answer because the Justification theme requires the programme manager to identify when the "pathway to benefits" is compromised. If staff are not trained, they cannot adopt the new ways of working, which delays the benefits. This delay must be addressed to protect the Business Case. While the programme manager is making a decision (Option A), the reason this situation is significant in an MSP context is that it affects the fundamental justification of the programme. The Justification theme ensures that the SRO and Programme Manager remain focused on the "why" of the programme—the benefits—and take action when those benefits are at risk of being delayed or lost due to operational conflicts between routine work and programme requirements.