Bob accidentally created the subdirectory \bobsdir in his home directory. He tried to remove the subdirectory with the command rmdir \bobsfile only to receive the error: "No such file or directory."…

`rmdir '~bob/\bobsdir'` would prevent `~bob` from expanding to the home directory and might not correctly interpret the literal backslash within the path, depending on the exact shell behavior.

`rmdir "~bob/\bobsdir"` would expand `~bob`, but the single backslash `\` within double quotes would still be interpreted as an escape character, likely not preserving the literal backslash in the directory name.

`rmdir ~bob/'bobsdir'` would attempt to remove a directory literally named `bobsdir` (without the leading backslash), which is not the directory Bob created.

`rmdir ~bob/\bobsdir` would interpret `\b` as an escape sequence for a backspace character or simply strip the backslash, searching for `obsdir` in Bob's home directory.

The `\` sequence in the shell represents a literal backslash. Therefore, `rmdir ~bob/\bobsdir` correctly targets the directory named `\bobsdir` within Bob's home directory.