The option that should be enabled in the Planning and Preparation Workbook to address this issue is C. Identity and Access Management for VMware Cloud Foundation. According to the VMware Cloud Foundation documentation1, Identity and Access Management for VMware Cloud Foundation is a prerequisite for deploying Developer Ready Infrastructure using VMware Cloud Foundation. Identity and Access Management for VMware Cloud Foundation provides a centralized identity and access management service for the SDDC components and workloads, using Workspace ONE Access as the identity provider. If this option is not enabled in the Planning and Preparation Workbook, the Developer Ready Infrastructure using VMware Cloud Foundation option will be excluded and display an error.

A. Stretched Cluster for Management Domain is not a correct option, because it is not related to the deployment of Developer Ready Infrastructure using VMware Cloud Foundation. Stretched Cluster for Management Domain is an optional feature that allows you to stretch the management domain across two availability zones for high availability and disaster recovery purposes2

B. Clustered Workspace ONE Access is not a correct option, because it is not required for deploying Developer Ready Infrastructure using VMware Cloud Foundation. Clustered Workspace ONE Access is an optional feature that allows you to deploy a highly available Workspace ONE Access instance using vRealize Suite Lifecycle Manager. This feature is only available when Identity and Access Management for VMware Cloud Foundation is enabled3

D. Stretched Cluster for Workload Domain is not a correct option, because it is not related to the deployment of Developer Ready Infrastructure using VMware Cloud Foundation. Stretched Cluster for Workload Domain is an optional feature that allows you to stretch a VI workload domain across two availability zones for high availability and disaster recovery purposes4

References: 1: Deploying Application Virtual Networks in VMware Cloud Foundation 2: Deploying Stretched Clusters in VMware Cloud Foundation 3: VMware Cloud Foundation Design for vRealize Suite Lifecycle and Access Management 4: Deploying Stretched Clusters in VMware Cloud Foundation