D. Service-level agreement
A Service-Level Agreement (SLA) is a contract between a service provider (in this case, the cloud provider) and its customer (the company shifting to the cloud) that defines the expected level of service and the commitments regarding service availability, performance, response times, and other aspects.
SLAs provide clear guidelines on the quality of service that the cloud provider is promising to deliver.
The management team should consult the cloud provider's SLA to understand the guaranteed availability and performance metrics of the cloud services.