An administrator wants to copy files from /opt/tools to the home directory at /home/admin. Which of the following should the administrator run?

`mkdir -p` creates directories but does not copy files or existing directories.

The `cp` command is used for copying files and directories. The `-R` (recursive) option is essential for copying directories and their entire contents. The `~` (tilde) character is a shell shortcut that expands to the current user's home directory, which in this case is `/home/admin`.

While `rsync` can copy files, the syntax `cd /opt/tools; rsync /home/admin` is incorrect for copying `/opt/tools` to `/home/admin`, as it lacks a proper source and destination specification for recursive directory copying.

`scp` is used for secure remote file copy, and `localhost:/` would attempt to copy to the root directory of the local machine, not the home directory, and lacks recursive handling for directories.