The correct answer is 'Rehosting (Lift and Shift)' because it facilitates a quick and straightforward transition by moving applications to the cloud without any changes. It minimizes the downtime during the migration process and allows the enterprise to start realizing the benefits of the cloud quickly.

While 'Refactoring' would eventually provide a more cloud-optimized application, it is a more time-consuming and complex approach that doesn't prioritize minimal service disruption. 'Retain' is not a migration strategy, as it implies keeping applications on-premises. 'Relocating' is generally focused on moving physical assets, which is not applicable in the context of this question.