Final answer:
The best description of a vision statement is a statement of what the firm will be in the future, depicting the company's long-term goals and aspirations.
Step-by-step explanation:
When considering which of the following is the best description of a vision statement, option C) a statement of what the firm will be in the future, is the most accurate. A vision statement looks forward and sets out a company's long-term goals and aspirations, depicting what they intend to become over time. It is not just about the current values, purposes, or stands of a firm, which align more with a company's mission statement or core values, nor is it about the measurable outcomes, which are typically outlined in a firm's strategic objectives and goal-setting processes.