Which of the following could BEST be described as "A decision support and planning tool that projects the likely consequences of a business action"?

A Problem Model is a predefined set of steps for handling a recurring problem type; it supports problem management, not business decision-making.

A Service Improvement Plan (SIP) is an action plan detailing specific steps to address service quality issues, not a tool for projecting business consequences.

A Request for Change (RFC) is a formal proposal to make a change, not a tool for projecting business consequences or supporting investment decisions.

A Business Case is the ITIL artifact specifically defined as a decision support and planning tool used to project the likely consequences of a business action, including costs, benefits, and risks. It is used during Service Strategy and Continual Service Improvement to justify investments or changes. No other ITIL document serves this exact decision-support and consequence-projection purpose.