what two steps are required to ensure that a change to one Single Sign-On instance is propagated to the other instances?

As part of a multisite Single Sign-On (SSO) deployment what two steps are required to ensure that a
change to one Single Sign-On instance is propagated to the other instances? (Choose two.)

A.
Schedule a Replication Task on the primary instance

B.
Select the first instance during the installation of subsequent instances

C.
During the installation of each instance choose Linked-Mode

D.
Enable Synchronize to Active Directory on each instance