To add an ESXi host with no disks to an existing vSAN cluster, the vSAN administrator needs to take the following steps:
Create a vSAN VMKernel interface on the new host, the interface should be configured with the same network settings as the existing vSAN cluster.
Create the required disk groups for the newly added host, the disk groups should contain at least one cache device and one or more capacity devices.
Add the new host to the vSAN cluster, this can be done through the vSphere Web Client.
Configure the storage policies and assign them to the virtual machines as needed.
It's worth noting that adding a host to an existing vSAN cluster does not require adding a minimum of three ESXi hosts or iSCSI shares, the host can be added without these requirements. Also, having physical NICs with equal network throughput is recommended but not a requirement.
This is explained in VMware vSAN documentation in the section "Adding a Host to a vSAN Cluster" Reference: https://docs.vmware.com/en/VMware-vSphere/7.0/vsphere-vsan-70-admin-guide/GUID-5B5F5F5D-9F9E-4E4F-9CA3-4CEF36E5D8F5.html

According to the VMware vSAN documentation [1], the vSAN Proactive Test is a built-in feature of vSAN that can be used to test the health of a vSAN cluster and verify that the network performance meets the throughput requirements. This tool can be accessed through the vSAN Health Service. [1] https://docs.vmware.com/en/VMware-vSphere/7.0/vsphere-esxi-vcenter-server-70-vsan-health-service-guide.pdf

The correct configuration that the administrator should apply to complete this installation is C. According to the VMware vSphere Lifecycle Manager Administration Guide [1], the quick boot setting in the host remediation settings for the images should be enabled in order to quickly apply the patch to the hosts. Quick boot is a feature that allows the host to restart with minimal downtime, and it allows the patch to be applied faster than if the host had to be restarted from the beginning. Disabling the hardware compatibility check and disabling HA admission control are not necessary and will not speed up the patching process.
[1] https://docs.vmware.com/en/VMware-vSphere/7.0/vsphere-esxi-vcenter-server-70-lifecycle-manager-administration-guide.pdf

To verify object resynchronization progress and impact after a global policy change, you can use vRealize Log Insight (C). According to the VMware Official Guide, "The vRealize Log Insight dashboard can be used to verify object resynchronization progress and impact after a global policy change."