Final answer:
A fishbone diagram is used for 5 Whys analysis to identify the root cause of a problem (C).
Step-by-step explanation:
A 5 Whys analysis is a problem-solving technique used to identify the root cause of a problem or issue. It involves asking 'why' multiple times to uncover deeper layers of causality.
A fishbone diagram, also known as a cause-and-effect diagram or an Ishikawa diagram, is a visual tool that helps to identify the potential causes of a problem. It uses a fishbone-shaped diagram to organize the causes into categories, which are represented as the fishbone's 'bones'. By exploring the cause-and-effect relationships, analyzing each cause in detail, and continuously asking 'why', the 5 Whys analysis helps to uncover the underlying root cause of a problem.
So, The correct option for performing a 5 Whys analysis is C. A fishbone diagram.