According to the VMware vRealize Operations Reference Materials, the cloud provider that needs to be added as a custom cloud provider when running a What-If Analysis is Oracle Cloud. The What-If Analysis feature allows the administrator to compare the cost and performance of running workloads in different public cloud providers, such as AWS, IBM Cloud, Microsoft Azure, Google Cloud, and Alibaba Cloud. These public cloud providers are supported out-of-the-box in vRealize Operations, and the administrator can select them from the predefined list when creating a migration scenario. However, if the administrator wants to compare the cost and performance of running workloads in Oracle Cloud, they need to add it as a custom cloud provider, and upload a rate card that contains the pricing information for Oracle Cloud services. The other options are incorrect because they are supported out-of-the-box in vRealize Operations, and they do not need to be added as a custom cloud provider when running a What-If Analysis. References: What-If-Analysis - Migration Planning: Public Cloud; VMware vRealize Operations What-If Analysis; VMware vRealize Operations for Public Cloud