Which three statements are true regarding the Network Time Protocol (NTP) in JUNOS platforms?（）

• A、MD5 authentication is supported.
• B、A client always synchronizes to a server even when the difference between the server clock and the local clock differs by a large amount.
• C、JUNOS software can provide a primary time reference.
• D、The boot-server configuration allows a router to synchronize its clock when it boots up, regardless of the offset between the NTP clock source and its internal clock.
• E、It is useful to correlate timestamps on log files and other events for troubleshooting and forensics.