/usr/share/help/C/ is in gnome-system-monitor 3.18.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/help/C/gnome-system-monitor/
/usr/share/help/C/gnome-system-monitor/commandline.page
/usr/share/help/C/gnome-system-monitor/cpu-check.page
/usr/share/help/C/gnome-system-monitor/cpu-mem-normal.page
/usr/share/help/C/gnome-system-monitor/cpu-multicore.page
/usr/share/help/C/gnome-system-monitor/fs-device.page
/usr/share/help/C/gnome-system-monitor/fs-diskusage.page
/usr/share/help/C/gnome-system-monitor/fs-info.page
/usr/share/help/C/gnome-system-monitor/fs-showall.page
/usr/share/help/C/gnome-system-monitor/index.page
/usr/share/help/C/gnome-system-monitor/legal.xml
/usr/share/help/C/gnome-system-monitor/mem-check.page
/usr/share/help/C/gnome-system-monitor/mem-swap.page
/usr/share/help/C/gnome-system-monitor/memory-map-use.page
/usr/share/help/C/gnome-system-monitor/net-bits.page
/usr/share/help/C/gnome-system-monitor/process-explain.page
/usr/share/help/C/gnome-system-monitor/process-files.page
/usr/share/help/C/gnome-system-monitor/process-identify-file.page
/usr/share/help/C/gnome-system-monitor/process-identify-hog.page
/usr/share/help/C/gnome-system-monitor/process-kill.page
/usr/share/help/C/gnome-system-monitor/process-many.page
/usr/share/help/C/gnome-system-monitor/process-priority-change.page
/usr/share/help/C/gnome-system-monitor/process-status.page
/usr/share/help/C/gnome-system-monitor/process-update-speed.page
/usr/share/help/C/gnome-system-monitor/solaris-mode.page
/usr/share/help/C/gnome-system-monitor/units.page