Which of the following cp command parameters copies only when the source file is newer...

The cp -u command copies only when the source file is newer than the destination file or when the destination file is missing.

Answer option C is incorrect. The cp -p command copies the files from source to destination with preserving file attributes, such as timestamps, mode, and ownership.

Answer option B is incorrect. The cp -l command links files from source to destination instead of copying.

Answer option D is incorrect. The cp -s command makes symbolic links instead of copying.