The correct answer is A. cd.
cd is a command-line utility for changing the current working directory. It is available on most Unix-like operating systems, including Linux, macOS, and *BSD.
The syntax for the cd command is as follows:
cd [directory]
If no directory is specified, cd changes to the user’s home directory.
For example, to change to the directory /home/user, you would type the following command:
cd /home/user
To change back to the previous directory, you can use the .. (dot dot) notation:
cd ..
You can also use the cd command to change to a directory that is relative to the current directory. For example, to change to the directory ../Documents, you would type the following command:
cd ../Documents
The cd command is a very useful tool for navigating the file system. It is also a very common command, so it is important to know how to use it.
The other options are incorrect because they are not valid commands.