Answer: The most effective promotional strategy for Melissa to use in this situation would likely be "B. personal selling."
Explanation: Personal selling involves building a relationship with potential customers and presenting the benefits of a product or service in a face-to-face setting. This is often the most effective way to sell complex or specialized products, such as insurance policies, because it allows Melissa to tailor her pitch to the specific needs and concerns of the business professionals she is targeting.
Telemarketing, radio advertisement, and sales promotion are all different types of promotional strategies that might be less effective in this situation. Telemarketing involves making sales pitches over the phone, which may not be as effective for a complex product like an insurance policy. Radio advertisement and sales promotion are more suitable for mass-market products or for creating awareness about a product, but may not be as effective for persuading business professionals to purchase a specialized insurance policy.