A System Administrator Is Auditing the Accounts on a Windows

Multiple Choice

A system administrator is auditing the accounts on a Windows computer and sees the following output from a command issued at the CLI. Which of the following describes the string of characters beside each username?
Administrator S-1-5-21-3108310220-2736563938-1271586134-500
David S-1-5-21-3108310220-2736563938-1271586134-1001
John S-1-5-21-3108310220-2736563938-1271586134-1002
Natalie S-1-5-21-3108310220-2736563938-1271586134-1003
Mark S-1-5-21-3108310220-2736563938-1271586134-1004
Guest S-1-5-21-3108310220-2736563938-1271586134-501

A) UID
B) SID
C) GID
D) LDAPID