Final answer:
A business memo to a stakeholder should outline the rationale for deciding to expand or not, considering factors such as market research and financial projections. In the case of the Big 12, the decision should be guided by anticipated future developments in the sports rights media landscape.
Step-by-step explanation:
In deciding whether to expand or not, a business memo to a stakeholder (e.g. Board of Directors) should outline the rationale for the decision along with the framework or analysis that guided the decision-making process. Factors such as market research, financial projections, and potential risks and benefits should be considered. In the case of the Big 12 deciding whether to expand in college sports, the optimal choice should be based on anticipated future developments in the sports rights media landscape, such as broadcasting deals and fan engagement trends.