With syslog, what is a facility?

[answerhappygod]

With syslog, what is a facility?

A. Facilities are different connection interfaces to syslog. Each facility has its own device in /dev/syslog/.
B. From syslog's point of view, each Unix process that issues messages is a facility.
C. Facilities describe the severity of a log message such as emerg or info.
D. When using remote logging, the hostname of the server that generated a message is called facility.
E. Facilities describe categories or groups of messages such as mail or auth.