Explanation
According to the PMBOK Guide 7th Edition, the project manager should monitor and control the project schedule by identifying and analyzing any variances, and by implementing corrective or preventive actions to ensure the timely completion of the project. The project manager should also consider the project environment and the stakeholder needs when managing the schedule, and use appropriate tools and techniques to optimize the schedule performance. Therefore, the project manager should update the schedule to reflect the holidays and share the workload among offices to mitigate schedule slippage. This would help to respect the cultural differences and the work-life balance of the team members, and to leverage the resources and the capabilities of the different offices. Option A is incorrect because it implies that the project manager is increasing the project cost and the complexity by hiring additional personnel on a temporary basis, which may not be feasible or effective. Option B is incorrect because it suggests that the project manager is imposing an unrealistic and unfair expectation on the offices in overseas locations, which may affect their motivation and productivity.
Option C is incorrect because it indicates that the project manager is accepting the schedule delay without exploring any alternatives or solutions, which may compromise the project value and the stakeholder satisfaction. References: PMBOK Guide 7th Edition, Chapter 4: Keeping the Team on Track, Section 4.1:
Monitoring and Controlling the Project, p. 69-70.