The Oracle VM administrator is having issues shutting down a virtual machine. Which log file will best help troubleshoot whether the shutdown command is being successfully executed on the target server? 

Answer options:

A. /var/log/ovs-agent/ovs_performance.log
B. /var/log/ovs-agent/ovs_operation.log
C. /var/log/xen/xend.log
D. /var/log/xen/xend-debug.log

C