The command is useful when you want your shell program to automatically remove any temporary files that are created when the shell script runs.

The trap command is useful when you want your shell program to automatically remove any temporary files that are created when the shell script runs. The trap command is a basic, but a very beneficial tool. If the script generates temporary files, like a simple script that changes FOO for BAR in entirely files in the existing directory, /tmp file will be clean when you exit the script.

i think its c but i'm not

answer; certification; plz check first, i believe this is correct. good luck;