To answer this question, let's break down the command and its options:
The command "find" is used to search for files and directories within a given directory hierarchy.
The dot (.) represents the current directory.
The option "-type f" is used to specify that the search should only include ordinary files (not directories or other types of files).
The option "-mtime 2" is used to specify that the search should include files that have been modified within the last 48 hours. The number 2 represents the number of days.
Therefore, the correct answer is C) list all ordinary files in the current directory that have been modified within the last 48 hours.