After the HR Admin [sn_hr_core.admin] role has been removed from the Admin role, how may a user with only the Admin role

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After the HR Admin [sn_hr_core.admin] role has been removed from the Admin role, how may a user with only the Admin role add members to HR groups?

A. The Admin must elevate their role to security_admin to add members to HR groups.
B. The Admin follows the same process as with any group membership change.
C. The Admin can no longer add members to HR groups.
D. The Admin must impersonate an HR Admin to add members to HR groups.