Which three options are the correct methods to implement end users in Cisco Unified Communications Manager? (Choose three.)

Manual configuration allows an administrator to add individual end users directly through the CUCM Administration interface, which is appropriate for small-scale or one-off deployments.

DHCP is a network protocol used to assign IP addresses to devices and has no role in provisioning end user accounts in CUCM.

The Bulk Administration Tool (BAT) allows administrators to import large numbers of end users via CSV files, making it the standard method for large-scale provisioning.

TFTP is used to deliver phone firmware and configuration files to IP phones during registration, not to create or manage end user records.

LDAP synchronization integrates CUCM with a corporate directory such as Microsoft Active Directory, automatically provisioning and continuously updating end user accounts from a single authoritative source.

Autoregistration is a feature for automatically registering IP phones with CUCM when they first connect to the network, not a method for provisioning end user accounts.