An administrator receives a warning about a filesystem filling up, and then identifies a large file located at /tmp/largelogfile. The administrator deletes the file, but no space is recovered on the filesystem.
Which of the following commands would BEST assists the administrator in identifying the problem?

A. lsof | grep largelogfile B. pkill /tmp/largelogfile C. pgrep largelogfile D. ps -ef | grep largelogfile