What are the two most likely causes of this problem?

After creating a new desktop pool that contains customization specifications, the administrator sees the following message in the VMware Horizon event database:

What are the two most likely causes of this problem? (Choose two.)
A . The administrator does not have sufficient permissions to access the customization specification.
B . The customization specification has been renamed or deleted.
C . Desktops can only be customized after the end user logs into the virtual machine.
D . Desktop pool provisioning is disabled.

Answer: AB

Explanation: https://docs.vmware.com/en/VMware-Horizon-7/7.3/horizon-virtual-desktops/GUID-CF25204FF88D-4296-9FDB-AEB550E24266.html