Explanation
a valid procedure to replace an expired vSAN license in a VMware Cloud Foundation environment is Option A.
You can add a new vSAN license to both the SDDC Manager and vCenter Server. Then reassign the vSAN license to the cluster in the vCenter Server . Finally, remove the expired vSAN license from both SDDC Manager and vCenter Server 2.
https://my-cloudy-world.com/2022/06/28/updating-a-vsan-license-in-vmware-cloud-foundation/

https://docs.vmware.com/en/VMware-Cloud-Foundation/5.0/vcf-admin/GUID-45A77DE0-A38D-4655-85E2-BB8969C6993F.html According to the VMware Cloud Foundation documentation1, the host you are adding must have the same type of principal storage as the existing hosts in the vSphere cluster. For VI workload domains, the host can use vSAN, NFS, VMFS on FC, or vVols for principal storage. A host using VMFS on FC will automatically use the same VMFS on FC configuration as the other hosts in the vSphere cluster.
Hosts with vSAN storage can be added to vSAN-based VI Workload domains, but not to VMFS on FC-based VI Workload domains. Hosts with vVols storage can be added to vVols-based VI Workload domains, but not to NFS-based VI Workload domains. Hosts with NFS storage can be added to NFS-based VI Workload domains, but not to VMFS on FC-based VI Workload domains.

Explanation
This is because according to VMware documentation , SDDC Manager is responsible for checking and downloading the online bundles for VCF upgrades from depot.vmware.com. The administrator can access SDDC Manager and download the bundles from Inventory > Workload Domains > MGMT > Update/Patches.

The NSX Manager is a standalone appliance that hosts the API services, the management plane, control plane, and policy management. As a result of this combined format, you no longer need to install the manager and controllers as separate VMs. The NSX Manager has three built-in roles: policy, manager, and controller 1.
B) Policy: NSX Manager is responsible for the creation and management of NSX-T policies, which are used to define networking and security configurations and rules.
C) Controller: NSX Manager also serves as a central management point for NSX-T controllers, which are responsible for implementing and enforcing networking and security policies across the NSX-T environment.
Reference:
VMware Cloud Foundation Specialist (v2) Exam Guide, section 2.2
NSX-T Data Center Administration Guide, section "NSX Manager and NSX-T Controllers"
https://shuttletitan.com/nsx-t/nsx-t-management-cluster-benefits-roles-ccp-sharding-and-failure-handling/

The three NSX components that are automated during the deployment of an edge cluster in a VMware Cloud Foundation environment are:
Edge VM deployment: SDDC Manager deploys the NSX Edge node virtual appliances on the vSphere cluster that backs the workload domain1.
Edge Uplink Profile configuration: SDDC Manager configures the edge uplink profile with the MTU, teaming policy, and transport VLAN settings for the edge nodes1.
Tier-0 and Tier-1 gateway configuration: SDDC Manager creates a tier-0 gateway and a tier-1 gateway for the edge cluster, and configures the routing, NAT, and firewall rules for them1.