What other information is needed to join the existing vCenter Single Sign-On domain?

An administrator is deploying a vCenter Server Appliance and wants to join an existing vCenter Single Sign-On domain.

The administrator gathers the following information:

✑ FQDN of the vCenter Single Sign-On server to join

✑ Domain name of the vCenter Single Sign-On server being joined

✑ Password of the vCenter Single Sign-On server administrator account.

What other information is needed to join the existing vCenter Single Sign-On domain? (Choose the best answer.)
A . vSphere Client port
B . Lightweight Directory Access Protocol (LDAP) port
C . Single Sign-On (SSO) port
D . HTTPS port