Which bash command must be used?

The project is migrated to a new codebase, the “old_project” directory must be deleted. The directory has multiple read-only files, and it must be deleted recursively without prompting for confirmation.

Which bash command must be used?
A . rm -rf old_project
B . rm -r old_project
C . rmdir -p old_project
D . rmdir old_project

Answer: A