The best answer is D .

The scenario is mainly about a merger where the combined enterprise wants to integrate store management and back-office systems, remove duplicate applications, maintain business operations, and continue innovating quickly. The most relevant TOGAF example Architecture Principles, besides Business Continuity , are therefore Service Orientation , Maximize Benefit to the Enterprise , and Common Use Applications .

Service Orientation is relevant because the company must integrate multiple digital channels, store systems, mobile apps, inventory systems, and back-office systems. A service-oriented approach supports interoperability, reuse, and more flexible integration. This is important where two companies need to combine systems while continuing to support customer-facing services.

Maximize Benefit to the Enterprise is highly relevant because merger decisions must be made for the benefit of the combined enterprise, not for one brand, department, store group, or legacy system owner. In a merger, there will often be competing preferences about which systems to retain. This principle helps ensure that architecture decisions are based on overall enterprise value.

Common Use Applications is especially important because the scenario explicitly states that the company will stop using duplicate systems, use one main system to manage the stores, and reduce the number of back-office applications. This principle directly supports the consolidation of similar or duplicative applications across the merged company.

Option A contains useful principles, but it is not the best answer. Control Technical Diversity is relevant to reducing complexity, and Data Trustee may help with shared data ownership. However, the option is weaker because Ease-of-Use focuses mainly on user interfaces, while the main merger challenge is application and back-office system consolidation.

Option B also contains useful principles, especially Data as an Asset and Technology Independence . However, it is not the strongest answer because it does not directly address the explicit requirement to reduce duplicate applications and consolidate store management and back-office systems. Common Use Applications is a closer match to that requirement.

Option C includes valid TOGAF principles, but it is not the best answer. Compliance with the Law is always important, and Requirements-Based Change and Responsive Change Management are relevant to controlled and timely change. However, the scenario is not primarily about legal compliance or general change responsiveness. It is specifically about merging two companies’ systems, reducing duplication, and maintaining operations.

Therefore, D is the best answer because it aligns most directly with the merger objectives: integrate systems, reduce duplicate applications, preserve operational continuity, and maximize value for the combined enterprise.