Which system log can the administrator access to determine the cause of the issue?

For security reasons, SSH and the ESXi Shell have been disabled on a standalone ESXi 5.x host.
A vSphere administrator accesses the Direct Console User Interface (DCUI) to examine log files
related to a recent connection issue.
Which system log can the administrator access to determine the cause of the issue?

A.
syslog

B.
fdm