Final answer:
The guarantee for constraining problems within manageable levels during a disaster for an architect is provided by (B) Managing plane controls. It ensures that the system remains resilient and mitigates the impact in order to prevent catastrophic outcomes.
Step-by-step explanation:
When architects or, more broadly, organizations need to ensure that potential disaster threats are manageable, it is essential to have robust plans in place. A master plan can be likened to a 'break glass in case of emergency' safeguard, enabling swift and appropriate responses to various threats.
The role of such a plan is pivotal in maintaining the stability and recovery potential of an organization, particularly concerning its data and IT infrastructure.
An architect, in the context of disaster recovery (DR) planning, must consider various aspects, such as data backups, managing control planes, handling provider outages, and evaluating portability alternatives. The constraint problems referred to in the question allude to designing systems that can be controlled when faced with issues that exceed the current disaster recovery capabilities. In this light, managing control planes and ensuring that an organization has proper monitoring and scalability controls in place are key to guaranteeing that problems don't exceed manageable levels.
Using the reference to 'asymmetric risk' and the idea of choosing between a Plan A and Plan B, it becomes clear that selecting the right disaster recovery measures is a strategic decision. The correct option that would provide the guarantee of constraining problems to a level that can be controlled is (B) Managing plane controls.
By having effective control planes, architects ensure that systems are resilient, scalable, and that any disaster's impact can be mitigated to prevent catastrophic outcomes. Thus, if a problem exceeds the capabilities of standard DR controls, having managed plane controls ensures the problem is still within a controllable spectrum.