Answer: c. Creates a child shell to execute it.
Explanation: For commands to be executed by the shell, it runs/lainches a subshell also known as a child shell to execute it (opens the file, interprets it one line at a time). This child shell is a separate instance of the command processor and helps in running batches of commands simultaneously. On completion of each command, the child shell passes exit status to the parent shell which displays the result to the user while waiting for more commands.
