Final answer:
Yashmi should include market analysis, team bios and roles, and financial projections in her event management firm's business plan to secure financing.
Step-by-step explanation:
Yashmi's business plan for starting an event management firm with her friends should comprehensively include several key components. Among these, A. Market analysis will help understand the industry, competitors, and target audience; B. Team bios and roles will outline the expertise and responsibilities of each partner in the firm; and C. Financial projections will provide an estimate of the firm’s financial outlook and viability. Therefore, D. All of the above are essential sections that should be included in her business plan to present a complete picture to potential financiers.