Which of the following is the BEST method for making a strategic decision to invest in cloud services?

Preparing a business case is the best method for a strategic decision because it provides a structured analysis of the costs, benefits, risks, and strategic alignment of investing in cloud services. It presents a comprehensive justification for the investment, enabling informed decision-making by demonstrating the value proposition to the organization.

Preparing an RFI is a preliminary step in vendor selection to gather information, not a strategic decision-making tool for the investment itself.

Benchmarking compares an organization's performance with others but doesn't provide a comprehensive justification for a specific strategic investment like a business case.

Defining a balanced scorecard is a performance management framework used to measure and manage strategy execution, not primarily for initial strategic investment decisions.